$336+ Cheap flights from Seattle (SEA) to London (LON)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LON
Dec 13 — Dec 201
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to London with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Seattle/Tacoma Intl to London are usually found in January or April, booked 82 days in advance, depart on a Monday or Tuesday and return on a Wednesday
Cheap flight deals from Seattle to London
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Cheapest flights from Seattle to LondonExplore the most affordable flight options available from Seattle to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2026.
Explore the most affordable flight options available from Seattle to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2026.
This oojo deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/52:35 pm -
1 stop20h 55m
Sun 12/1312:15 pm -
1 stop12h 45m
Deal found 11/11![Icelandair logo]()
$665
This oojo deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/272:35 pm -
1 stop20h 55m
Sat 12/128:35 pm -
1 stop28h 25m
Deal found 11/11![Icelandair logo]()
$666
This FlightHub deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/52:35 pm -
1 stop20h 55m
Sat 12/128:35 pm -
1 stop28h 25m
Deal found 11/12![Icelandair logo]()
$671
This Mytrip deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/82:35 pm -
2 stops23h 10m
Thu 12/247:00 am -
2 stops18h 00m
Deal found 11/11![Multiple Airlines logo]()
$673
This Mytrip deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/67:45 am -
3 stops29h 50m
Sat 12/127:10 pm -
2 stops25h 50m
Deal found 11/11![Multiple Airlines logo]()
$681
This Mytrip deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/88:30 am -
3 stops29h 10m
Thu 12/2410:20 am -
2 stops34h 40m
Deal found 11/11![Multiple Airlines logo]()
$692
This Justfly.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/252:35 pm -
1 stop20h 55m
Wed 12/28:35 pm -
1 stop28h 25m
Deal found 11/8![Icelandair logo]()
$695
This Mytrip deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/127:45 am -
2 stops25h 55m
Wed 11/186:40 am -
2 stops22h 19m
Deal found 11/9![Multiple Airlines logo]()
$696
This Mytrip deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/87:45 am -
3 stops29h 35m
Tue 12/151:55 pm -
2 stops31h 05m
Deal found 11/10![Multiple Airlines logo]()
$699
This oojo deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/242:35 pm -
1 stop20h 55m
Tue 12/812:15 pm -
1 stop12h 45m
Deal found 11/12![Icelandair logo]()
$701
This Mytrip deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/262:35 pm -
3 stops33h 30m
Thu 12/35:40 pm -
3 stops31h 20m
Deal found 11/8![Multiple Airlines logo]()
$707
This Mytrip deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/17:45 am -
2 stops25h 05m
Tue 12/84:45 pm -
3 stops28h 15m
Deal found 11/9![Multiple Airlines logo]()
$715
Best flights from Seattle to LondonDiscover carefully curated flight deals from Seattle to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 13, 2026.
Discover carefully curated flight deals from Seattle to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 13, 2026.
This Icelandair deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/123:40 pm -
1 stop12h 15m
Sat 4/249:25 pm -
1 stop31h 15m
Deal found 11/12![Icelandair logo]()
$667
This Delta deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/94:50 pm -
Nonstop9h 50m
Tue 12/1512:20 pm -
Nonstop10h 30m
Deal found 11/11![Delta logo]()
$815
This KLM deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/44:55 pm -
Nonstop9h 45m
Fri 2/126:20 am -
1 stop16h 43m
Deal found 11/11![Multiple Airlines logo]()
$820
This KLM deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/274:55 pm -
Nonstop9h 45m
Wed 2/1012:20 pm -
Nonstop10h 25m
Deal found 11/10![KLM logo]()
$832
This Virgin Atlantic deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/246:00 am -
2 stops19h 00m
Wed 2/310:00 am -
1 stop13h 03m
Deal found 11/11![Virgin Atlantic logo]()
$839
This United Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/138:09 am -
2 stops18h 16m
Tue 12/159:00 am -
2 stops19h 47m
Deal found 11/12![United Airlines logo]()
$871
This Turkish Airlines deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/197:05 pm -
1 stop30h 50m
Tue 2/25:20 pm -
1 stop31h 50m
Deal found 11/9![Turkish Airlines logo]()
$879
This Alaska Airlines deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/129:30 pm -
Nonstop9h 35m
Fri 5/215:00 pm -
Nonstop10h 10m
Deal found 11/9![Alaska Airlines logo]()
$902
This SWISS deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/76:35 pm -
2 stops15h 15m
Mon 5/109:25 am -
2 stops15h 55m
Deal found 11/12![SWISS logo]()
$943
This Delta deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/97:15 am -
1 stop25h 15m
Thu 12/1710:45 am -
1 stop14h 10m
Deal found 11/11![Delta logo]()
$829
This KLM deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/134:55 pm -
Nonstop9h 45m
Sun 1/2412:20 pm -
Nonstop10h 25m
Deal found 11/8![KLM logo]()
$884
This United deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/17:05 pm -
1 stop32h 45m
Fri 12/46:00 am -
2 stops22h 59m
Deal found 11/12![Multiple Airlines logo]()
$888
This United Airlines deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/135:28 pm -
1 stop36h 02m
Mon 3/292:05 pm -
2 stops29h 35m
Deal found 11/10![United Airlines logo]()
$936
This Turkish Airlines deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/247:05 pm -
1 stop37h 15m
Sun 1/3110:55 am -
1 stop38h 15m
Deal found 11/11![Turkish Airlines logo]()
$938
This Delta deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/133:25 pm -
1 stop16h 20m
Sun 1/2410:00 am -
1 stop13h 13m
Deal found 11/8![Delta logo]()
$885
This Icelandair deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/49:25 am -
2 stops17h 25m
Tue 12/812:15 pm -
1 stop12h 45m
Deal found 11/12![Multiple Airlines logo]()
$924
This Turkish Airlines deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/277:05 pm -
1 stop30h 50m
Mon 12/710:55 am -
1 stop38h 15m
Deal found 11/9![Turkish Airlines logo]()
$1,029
This Icelandair deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/52:35 pm -
1 stop20h 55m
Sat 12/1212:15 pm -
2 stops17h 35m
Deal found 11/9![Multiple Airlines logo]()
$969
This Delta deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/114:05 pm -
1 stop15h 40m
Mon 3/299:55 am -
2 stops40h 35m
Deal found 11/10![Delta logo]()
$1,015
This Turkish Airlines deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/97:05 pm -
1 stop30h 50m
Fri 1/2210:55 am -
1 stop38h 15m
Deal found 11/11![Turkish Airlines logo]()
$1,060
This Turkish Airlines deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/37:05 pm -
1 stop37h 25m
Wed 2/175:25 pm -
2 stops35h 30m
Deal found 11/10![Turkish Airlines logo]()
$1,133
This Turkish Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/251:13 pm -
2 stops35h 57m
Tue 3/25:25 pm -
1 stop31h 45m
Deal found 11/12![Turkish Airlines logo]()
$1,174
This Turkish Airlines deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/237:05 pm -
1 stop30h 50m
Wed 12/210:55 am -
1 stop38h 15m
Deal found 11/8![Turkish Airlines logo]()
$1,191
This Turkish Airlines deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/161:18 pm -
2 stops36h 37m
Sun 1/245:20 pm -
1 stop31h 50m
Deal found 11/8![Turkish Airlines logo]()
$1,201
This Delta deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/213:25 pm -
1 stop16h 20m
Fri 1/810:00 am -
1 stop13h 13m
Deal found 11/9![Delta logo]()
$1,603
This Turkish Airlines deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/131:18 pm -
2 stops43h 02m
Sun 1/2410:55 am -
1 stop38h 15m
Deal found 11/8![Turkish Airlines logo]()
$1,201
This Turkish Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/231:21 pm -
2 stops43h 09m
Fri 2/2610:05 am -
1 stop39h 05m
Deal found 11/12![Turkish Airlines logo]()
$1,204
This Turkish Airlines deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/17:05 pm -
1 stop30h 05m
Mon 2/85:25 pm -
2 stops58h 13m
Deal found 11/10![Turkish Airlines logo]()
$1,209
This Turkish Airlines deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/131:18 pm -
2 stops25h 17m
Sun 1/245:25 pm -
1 stop31h 45m
Deal found 11/8![Turkish Airlines logo]()
$1,209
This Turkish Airlines deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:05 pm -
1 stop30h 50m
Sat 12/1210:55 am -
1 stop38h 15m
Deal found 11/9![Turkish Airlines logo]()
$1,216
Last-minute flights from Seattle to LondonDiscover last-minute flight deals from Seattle to London. Data last updated November 13, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to London. Data last updated November 13, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/127:45 am -
2 stops25h 55m
Wed 11/186:40 am -
2 stops22h 19m
Deal found 11/9![Multiple Airlines logo]()
$696
This oojo deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/242:35 pm -
1 stop20h 55m
Tue 12/812:15 pm -
1 stop12h 45m
Deal found 11/12![Icelandair logo]()
$701
This Justfly.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/252:35 pm -
1 stop20h 55m
Wed 12/28:35 pm -
1 stop28h 25m
Deal found 11/8![Icelandair logo]()
$695
This Mytrip deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/262:35 pm -
3 stops33h 30m
Thu 12/35:40 pm -
3 stops31h 20m
Deal found 11/8![Multiple Airlines logo]()
$707
This oojo deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/272:35 pm -
1 stop20h 55m
Sat 12/128:35 pm -
1 stop28h 25m
Deal found 11/11![Icelandair logo]()
$666
This Mytrip deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/17:45 am -
2 stops25h 05m
Tue 12/84:45 pm -
3 stops28h 15m
Deal found 11/9![Multiple Airlines logo]()
$715
This oojo deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/52:35 pm -
1 stop20h 55m
Sun 12/1312:15 pm -
1 stop12h 45m
Deal found 11/11![Icelandair logo]()
$665
This FlightHub deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/52:35 pm -
1 stop20h 55m
Sat 12/128:35 pm -
1 stop28h 25m
Deal found 11/12![Icelandair logo]()
$671
This Mytrip deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/67:45 am -
3 stops29h 50m
Sat 12/127:10 pm -
2 stops25h 50m
Deal found 11/11![Multiple Airlines logo]()
$681
This Mytrip deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/82:35 pm -
2 stops23h 10m
Thu 12/247:00 am -
2 stops18h 00m
Deal found 11/11![Multiple Airlines logo]()
$673
This Mytrip deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/88:30 am -
3 stops29h 10m
Thu 12/2410:20 am -
2 stops34h 40m
Deal found 11/11![Multiple Airlines logo]()
$692
This Mytrip deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/87:45 am -
3 stops29h 35m
Tue 12/151:55 pm -
2 stops31h 05m
Deal found 11/10![Multiple Airlines logo]()
$699
One-way flights from Seattle to LondonSearch for one-way flight options from Seattle to London. Find affordable one-way fares based on user searches. Data last updated November 13, 2026.
Search for one-way flight options from Seattle to London. Find affordable one-way fares based on user searches. Data last updated November 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/72:35 pm -
2 stops17h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/11![Multiple Airlines logo]()
$336
This Mytrip deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/102:35 pm -
3 stops23h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Multiple Airlines logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/242:35 pm -
3 stops21h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Multiple Airlines logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/295:52 pm -
1 stop34h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Multiple Airlines logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/242:35 pm -
3 stops21h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Multiple Airlines logo]()
$339
This Virgin Atlantic deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/157:15 am -
2 stops17h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Virgin Atlantic logo]()
$339
This FlightHub deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/247:00 pm -
1 stop11h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Icelandair logo]()
$340
This oojo deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/252:35 pm -
1 stop20h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Icelandair logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/82:35 pm -
2 stops17h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Multiple Airlines logo]()
$342
This Kiwi.com deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/225:48 pm -
1 stop35h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/10![Multiple Airlines logo]()
$342
This Mytrip deal was found by Cheapflights users on 11/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/22:35 pm -
2 stops18h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/8![Multiple Airlines logo]()
$343
This FlightHub deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/273:15 pm -
2 stops31h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/9![Air Canada logo]()
$343
Find flight deals from Seattle to London
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 13, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $651 (Mytrip) |
One-way from | $336 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $867 |
Good round-trip deal | $920 or less |
Good one-way deal | $507 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated November 13, 2026.
Use the filters below to find and compare flights from Seattle to London that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleLondon
SEA Seattle/Tacoma Intl - LGW London Gatwick
SEALGW
Seattle/Tacoma Intl
Sat 2/6
4:05 pm-3:45 pm
1 stop15h 40m
London Gatwick
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$384
SeattleLondon
SEA Seattle/Tacoma Intl - LGW London Gatwick
SEALGW
Seattle/Tacoma Intl
Fri 2/26
3:30 pm-3:45 pm
1 stop16h 15m
London Gatwick
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$384
SeattleLondon
SEA Seattle/Tacoma Intl - LGW London Gatwick
SEALGW
Seattle/Tacoma Intl
Sat 5/1
6:35 pm-4:00 pm
1 stop13h 25m
London Gatwick
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$384
SeattleLondon
SEA Seattle/Tacoma Intl - STN London Stansted
SEASTN
Seattle/Tacoma Intl
Tue 11/24
2:35 pm-2:00 pm
3 stops39h 25m
London Stansted
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$386
SeattleLondon
SEA Seattle/Tacoma Intl - LGW London Gatwick
SEALGW
Seattle/Tacoma Intl
Sat 5/8
7:00 am-8:25 am
2 stops17h 25m
London Gatwick
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$390
SeattleLondon
SEA Seattle/Tacoma Intl - LGW London Gatwick
SEALGW
Seattle/Tacoma Intl
Sat 12/5
2:35 pm-2:15 pm
2 stops15h 40m
London Gatwick
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$419
SeattleLondon
SEA Seattle/Tacoma Intl - LHR London Heathrow
SEALHR
Seattle/Tacoma Intl
Fri 12/11
2:35 pm-7:30 pm
1 stop20h 55m
London Heathrow
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$503
SeattleLondon
SEA Seattle/Tacoma Intl - STN London Stansted
SEASTN
Seattle/Tacoma Intl
Tue 12/29
2:35 pm-6:05 pm
2 stops19h 30m
London Stansted
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$504
SeattleLondon
SEA Seattle/Tacoma Intl - LGW London Gatwick
SEALGW
Seattle/Tacoma Intl
Sat 2/27
11:02 pm-7:30 am
1 stop24h 28m
London Gatwick
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$559
SeattleLondon
SEA Seattle/Tacoma Intl - LGW London Gatwick
SEALGW
Seattle/Tacoma Intl
Wed 5/12
10:59 pm-8:55 am
1 stop25h 56m
London Gatwick
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$572
Showing 1-10 of 60 resultsSorted by cheapest first
Compare providers for flights from Seattle to London
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to London in November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Seattle-London flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Seattle-London flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Seattle-London flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-London flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Seattle to London
Have a flexible travel schedule? Discover the best time to fly to London from Seattle with our price prediction graph.
SEA-LON
SEA-LHR
SEA-LGW
SEA-STN
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Seattle to London
SEA-LON
SEA-LHR
SEA-LGW
SEA-STN
What is the cheapest month to book a flight from Seattle to London?
Currently, January is the cheapest month in which you can book a flight from Seattle to London (average of $721). Flying from Seattle to London in June is currently the most expensive (average of $1,226). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from SEA to LON?
Find hourly flight availability from Seattle to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 13, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to London as you normally would.
Weekly flight availability from Seattle to London
Explore weekly flight availability from Seattle to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 13, 2026.
The most flights from SEA to LON are scheduled on a Monday (13 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (13 on average).
How much does it cost to fly round-trip from Seattle to London?
Airfare is below average for this route at the moment.
Seattle to London flights typically cost between $686 and $1,056 in February.The cheapest round-trip price found within the last 5 days was $651 on Multiple Airlines (Feb 10-Feb 16).
What’s the top layover airport for flights from Seattle to London?
Share of 1-stop round-trip flights from Seattle to London chosen by Cheapflights users in the past 12 months, using the same layover each way.
Reykjavik (KEF) – chosen by Cheapflights users on 71% of 1-stop itineraries from Seattle to London on Cheapflights.
What’s the cheapest layover airport for flights from Seattle to London?
Average round-trip fare for 1-stop flights from Seattle to London, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Montreal (YUL) is the most affordable 1-stop option, with an average round-trip price of $631.
What’s the fastest layover option from Seattle to London?
Shortest average travel time for 1-stop one-way flights from Seattle to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 12h 35m.
Which airport typically offers the quickest layover for flights from Seattle to London?
Average layover duration for 1-stop one-way flights from Seattle to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Frankfurt am Main (FRA) offer the fastest connection on this route, with an average layover time of 1h 13m.
How often are flights from Seattle to London delayed?
About 14% of weekly flights between Seattle and London have experienced delays in the past year, with the average delay time being 130 minutes.
What is the most punctual flight time for Seattle to London flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on Seattle to London flights?
Over the last year, Virgin Atlantic have had the lowest number of delays on this route, with just 5% of flights being delayed.
How far ahead should I book a flight from Seattle to London?
Booking 55 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
The best insider tips for Seattle to London flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to London trip
Our travel experts
Reviews of airlines servicing London
Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated November 13, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andVirgin Atlantic from Seattle to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Entertainment
7.0
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentParduman,Nov 2026
SEA - LHR
Overall
7.9
Entertainment
7.0
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentParduman,Nov 2026
SEA - LHR
Overall
7.9
Entertainment
7.0
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentParduman,Nov 2026
SEA - LHR
Overall
7.9
Entertainment
7.0
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentParduman,Nov 2026
SEA - LHR
Overall
7.9
Entertainment
7.0
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentParduman,Nov 2026
SEA - LHR
Overall
7.9
Entertainment
7.0
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
10.0
ExcellentParduman,Nov 2026
SEA - LHR
Related info for your journey
Find useful and relevant information for your journey from Seattle to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near London?
Book flights to London if you plan to visit one of these locationsIlford
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Croydon
Kingston upon Thames
Chipping Norton
Slough
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Watford
Stansted
Sutton
Luton
Bedford
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Top 10 airlines flying from Seattle to London
Discover the top 10 airlines that operate flights from Seattle to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated November 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$440 | Average$1,162 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$492 | Average$750 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$542 | Average$706 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$578 | Average$1,026 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$594 | Average$939 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$607 | Average$824 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$638 | Average$929 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$641 | Average$1,037 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$656 | Average$864 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$660 | Average$985 | FlexibilityNo cancel fee | On-time75% |