$518+ Cheap flights from London (LON) to Seattle (SEA)
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 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
Nov 4 — Nov 111
Round-trip
1 adult, Economy
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Find cheap flights from London to Seattle 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 London to Seattle/Tacoma Intl are usually found in February or January, booked 73 days in advance, depart on a Monday or Wednesday and return on a Monday
Cheap flight deals from London to Seattle
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Cheapest flights from London to SeattleExplore the most affordable flight options available from London to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 5, 2026.
Explore the most affordable flight options available from London to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 5, 2026.
This TravelUp deal was found by Cheapflights users on 9/30. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/78:20 am -
1 stop19h 49m
Mon 11/301:25 pm -
1 stop12h 35m
Deal found 9/30![Virgin Atlantic logo]()
$549
This Gotogate deal was found by Cheapflights users on 9/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/81:05 pm -
1 stop15h 35m
Wed 10/217:00 pm -
1 stop32h 55m
Deal found 9/30![Icelandair logo]()
$550
This Booking.com deal was found by Cheapflights users on 9/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/86:15 am -
1 stop13h 00m
Thu 10/155:30 pm -
Nonstop9h 50m
Deal found 9/30![Virgin Atlantic logo]()
$551
This Delta deal was found by Cheapflights users on 9/30. 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.
Fri 10/96:30 am -
1 stop18h 05m
Wed 10/147:24 am -
1 stop15h 21m
Deal found 9/30![Delta logo]()
$552
This Delta deal was found by Cheapflights users on 9/30. 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.
Tue 12/86:30 am -
1 stop13h 20m
Thu 1/144:55 pm -
Nonstop9h 45m
Deal found 9/30![Delta logo]()
$553
This TravelUp deal was found by Cheapflights users on 9/30. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/122:30 pm -
1 stop17h 26m
Tue 10/206:00 am -
1 stop20h 20m
Deal found 9/30![Virgin Atlantic logo]()
$554
This lol.travel deal was found by Cheapflights users on 10/1. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:00 pm -
Nonstop10h 00m
Fri 10/239:40 pm -
Nonstop9h 25m
Deal found 10/1![Alaska Airlines logo]()
$555
This Justfly.com deal was found by Cheapflights users on 10/2. 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 11/411:55 am -
1 stop13h 05m
Sat 11/142:35 pm -
1 stop12h 20m
Deal found 10/2![Icelandair logo]()
$557
This TravelUp deal was found by Cheapflights users on 9/30. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/199:25 pm -
1 stop28h 30m
Fri 10/233:40 pm -
1 stop12h 15m
Deal found 9/30![Icelandair logo]()
$557
This Justfly.com deal was found by Cheapflights users on 10/2. 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 11/411:55 am -
1 stop13h 05m
Tue 11/172:35 pm -
1 stop12h 20m
Deal found 10/2![Icelandair logo]()
$558
This Delta deal was found by Cheapflights users on 9/30. 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.
Sun 12/136:30 am -
2 stops22h 12m
Tue 1/194:55 pm -
Nonstop9h 45m
Deal found 9/30![Delta logo]()
$558
This Delta deal was found by Cheapflights users on 9/30. 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 12/78:55 am -
1 stop14h 18m
Sun 1/174:55 pm -
Nonstop9h 45m
Deal found 9/30![Delta logo]()
$559
Best flights from London to SeattleDiscover carefully curated flight deals from London to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 5, 2026.
Discover carefully curated flight deals from London to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 5, 2026.
This Delta deal was found by Cheapflights users on 9/30. 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 11/196:30 am -
1 stop13h 17m
Thu 12/34:50 pm -
Nonstop9h 50m
Deal found 9/30![Delta logo]()
$552
This KLM deal was found by Cheapflights users on 9/30. 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.
Fri 10/911:45 am -
1 stop12h 50m
Wed 10/145:30 pm -
Nonstop9h 50m
Deal found 9/30![KLM logo]()
$552
This KLM deal was found by Cheapflights users on 9/30. 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.
Fri 10/99:55 am -
1 stop14h 40m
Wed 10/146:40 pm -
1 stop13h 55m
Deal found 9/30![Multiple Airlines logo]()
$567
This Alaska Airlines deal was found by Cheapflights users on 10/4. 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.
Tue 11/242:45 pm -
Nonstop10h 15m
Sat 12/56:45 pm -
Nonstop9h 35m
Deal found 10/4![Alaska Airlines logo]()
$570
This Virgin Atlantic deal was found by Cheapflights users on 9/30. 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.
Tue 11/2410:00 am -
2 stops30h 45m
Tue 12/84:05 pm -
1 stop15h 40m
Deal found 9/30![Virgin Atlantic logo]()
$573
This Icelandair deal was found by Cheapflights users on 10/3. 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.
Wed 12/238:35 pm -
1 stop28h 25m
Sun 1/102:35 pm -
1 stop12h 15m
Deal found 10/3![Icelandair logo]()
$608
This United Airlines deal was found by Cheapflights users on 10/2. 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.
Tue 11/39:30 am -
2 stops20h 19m
Sun 11/153:15 pm -
1 stop12h 35m
Deal found 10/2![United Airlines logo]()
$734
This British Airways deal was found by Cheapflights users on 10/2. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/42:55 pm -
Nonstop9h 55m
Sun 11/156:14 am -
1 stop16h 41m
Deal found 10/2![British Airways logo]()
$756
This Condor deal was found by Cheapflights users on 10/1. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/3110:25 am -
1 stop13h 30m
Sun 12/63:00 pm -
1 stop16h 00m
Deal found 10/1![Condor logo]()
$772
This Turkish Airlines deal was found by Cheapflights users on 9/30. 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 1/285:20 pm -
2 stops37h 19m
Mon 2/110:54 am -
2 stops39h 01m
Deal found 9/30![Turkish Airlines logo]()
$959
This Alaska Airlines deal was found by Cheapflights users on 10/2. 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.
Tue 11/32:45 pm -
Nonstop10h 15m
Sat 11/146:45 pm -
Nonstop9h 35m
Deal found 10/2![Alaska Airlines logo]()
$570
This Delta deal was found by Cheapflights users on 9/30. 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.
Fri 2/1910:00 am -
1 stop13h 03m
Sat 2/274:05 pm -
1 stop15h 40m
Deal found 9/30![Delta logo]()
$582
This Alaska Airlines deal was found by Cheapflights users on 10/2. 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.
Mon 11/22:45 pm -
Nonstop10h 15m
Sun 11/156:45 pm -
Nonstop9h 35m
Deal found 10/2![Alaska Airlines logo]()
$570
This Delta deal was found by Cheapflights users on 9/30. 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.
Fri 1/1510:00 am -
1 stop13h 13m
Fri 1/223:25 pm -
1 stop16h 20m
Deal found 9/30![Delta logo]()
$582
This Alaska Airlines deal was found by Cheapflights users on 10/3. 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.
Sat 10/105:00 pm -
Nonstop10h 00m
Fri 10/239:40 pm -
Nonstop9h 25m
Deal found 10/3![Alaska Airlines logo]()
$570
This United Airlines deal was found by Cheapflights users on 10/4. 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.
Thu 11/267:30 am -
2 stops21h 26m
Sun 12/67:00 am -
2 stops15h 40m
Deal found 10/4![United Airlines logo]()
$736
This Icelandair deal was found by Cheapflights users on 10/3. 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 10/163:40 pm -
1 stop13h 00m
Fri 4/167:00 pm -
1 stop11h 40m
Deal found 10/3![Icelandair logo]()
$751
This Alaska Airlines deal was found by Cheapflights users on 10/2. 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.
Fri 10/95:00 pm -
Nonstop10h 00m
Thu 10/229:40 pm -
Nonstop9h 25m
Deal found 10/2![Alaska Airlines logo]()
$571
This Mytrip deal was found by Cheapflights users on 9/30. 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.
Sat 11/285:15 pm -
2 stops27h 50m
Mon 11/305:50 pm -
2 stops19h 10m
Deal found 9/30![Multiple Airlines logo]()
$886
This Virgin Atlantic deal was found by Cheapflights users on 10/1. 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.
Fri 3/1210:00 am -
2 stops20h 04m
Tue 3/235:05 pm -
1 stop15h 40m
Deal found 10/1![Virgin Atlantic logo]()
$928
This Turkish Airlines deal was found by Cheapflights users on 10/2. 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 11/135:25 pm -
2 stops37h 42m
Thu 11/2610:50 am -
2 stops38h 20m
Deal found 10/2![Turkish Airlines logo]()
$985
This Virgin Atlantic deal was found by Cheapflights users on 10/3. 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.
Fri 10/304:45 pm -
2 stops24h 51m
Tue 11/108:30 am -
2 stops23h 15m
Deal found 10/3![Virgin Atlantic logo]()
$930
This Icelandair deal was found by Cheapflights users on 10/3. 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 11/611:55 am -
2 stops29h 12m
Fri 5/77:00 pm -
1 stop11h 40m
Deal found 10/3![Icelandair logo]()
$932
This Mytrip deal was found by Cheapflights users on 9/30. 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.
Sat 11/147:05 am -
2 stops21h 54m
Sat 11/218:40 am -
3 stops24h 40m
Deal found 9/30![Multiple Airlines logo]()
$934
This Condor deal was found by Cheapflights users on 9/30. 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 Condor is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/138:15 pm -
1 stop27h 40m
Thu 1/1411:00 pm -
2 stops26h 35m
Deal found 9/30![Condor logo]()
$1,071
This Turkish Airlines deal was found by Cheapflights users on 10/1. 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 1/245:20 pm -
2 stops37h 25m
Fri 1/2910:52 am -
2 stops39h 03m
Deal found 10/1![Turkish Airlines logo]()
$987
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Thu 11/126:00 am -
1 stop19h 00m
Wed 11/182:35 pm -
1 stop14h 25m
Deal found 10/1![Multiple Airlines logo]()
$942
This Virgin Atlantic deal was found by Cheapflights users on 10/1. 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.
Thu 10/2910:00 am -
2 stops19h 49m
Thu 11/54:05 pm -
1 stop15h 40m
Deal found 10/1![Virgin Atlantic logo]()
$953
This Turkish Airlines deal was found by Cheapflights users on 10/4. 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 11/55:20 pm -
1 stop32h 50m
Tue 11/1010:50 am -
2 stops39h 05m
Deal found 10/4![Turkish Airlines logo]()
$997
This Kiwi.com deal was found by Cheapflights users on 9/30. 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.
Thu 11/196:00 am -
1 stop19h 00m
Wed 12/22:35 pm -
1 stop14h 25m
Deal found 9/30![Multiple Airlines logo]()
$953
Last-minute flights from London to SeattleDiscover last-minute flight deals from London to Seattle. Data last updated October 5, 2026 and is based on user searches.
Discover last-minute flight deals from London to Seattle. Data last updated October 5, 2026 and is based on user searches.
This TravelUp deal was found by Cheapflights users on 9/30. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/711:20 am -
2 stops18h 45m
Mon 11/301:25 pm -
1 stop12h 35m
Deal found 9/30![Virgin Atlantic logo]()
$549
This Gotogate deal was found by Cheapflights users on 9/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/81:05 pm -
1 stop15h 35m
Wed 10/217:00 pm -
1 stop32h 55m
Deal found 9/30![Icelandair logo]()
$550
This Booking.com deal was found by Cheapflights users on 9/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/86:15 am -
1 stop13h 00m
Thu 10/155:30 pm -
Nonstop9h 50m
Deal found 9/30![Virgin Atlantic logo]()
$551
This Delta deal was found by Cheapflights users on 9/30. 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 10/86:30 am -
2 stops18h 15m
Sat 10/171:30 pm -
1 stop12h 30m
Deal found 9/30![Delta logo]()
$558
This Delta deal was found by Cheapflights users on 9/30. 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.
Fri 10/99:55 am -
1 stop14h 40m
Sun 10/1111:59 pm -
1 stop23h 16m
Deal found 9/30![Delta logo]()
$552
This lol.travel deal was found by Cheapflights users on 10/1. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:00 pm -
Nonstop10h 00m
Fri 10/239:40 pm -
Nonstop9h 25m
Deal found 10/1![Alaska Airlines logo]()
$555
This TravelUp deal was found by Cheapflights users on 9/30. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/122:30 pm -
1 stop17h 26m
Tue 10/206:00 am -
1 stop20h 20m
Deal found 9/30![Virgin Atlantic logo]()
$554
This Justfly.com deal was found by Cheapflights users on 10/5. 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.
Tue 10/133:40 pm -
1 stop13h 00m
Tue 5/47:00 pm -
1 stop11h 40m
Deal found 10/5![Icelandair logo]()
$560
This TravelUp deal was found by Cheapflights users on 9/30. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/199:25 pm -
1 stop28h 30m
Fri 10/233:40 pm -
1 stop12h 15m
Deal found 9/30![Icelandair logo]()
$557
This Justfly.com deal was found by Cheapflights users on 10/2. 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 11/411:55 am -
1 stop13h 05m
Sat 11/142:35 pm -
1 stop12h 20m
Deal found 10/2![Icelandair logo]()
$557
This Justfly.com deal was found by Cheapflights users on 10/2. 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 11/411:55 am -
1 stop13h 05m
Tue 11/172:35 pm -
1 stop12h 20m
Deal found 10/2![Icelandair logo]()
$558
This Justfly.com deal was found by Cheapflights users on 10/2. 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 11/412:15 pm -
1 stop12h 45m
Tue 11/172:35 pm -
1 stop12h 15m
Deal found 10/2![Icelandair logo]()
$559
One-way flights from London to SeattleSearch for one-way flight options from London to Seattle. Find affordable one-way fares based on user searches. Data last updated October 5, 2026.
Search for one-way flight options from London to Seattle. Find affordable one-way fares based on user searches. Data last updated October 5, 2026.
This Iberia deal was found by Cheapflights users on 10/4. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2511:45 am -
2 stops31h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Iberia logo]()
$518
This Kiwi.com deal was found by Cheapflights users on 10/4. 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 1/85:45 pm -
3 stops50h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Multiple Airlines logo]()
$518
This Lufthansa deal was found by Cheapflights users on 10/2. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/166:30 am -
1 stop13h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Lufthansa logo]()
$518
This Kiwi.com deal was found by Cheapflights users on 10/4. 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 2/712:15 pm -
3 stops53h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Multiple Airlines logo]()
$518
This Kiwi.com deal was found by Cheapflights users on 10/1. 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.
Wed 12/25:55 pm -
3 stops47h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Multiple Airlines logo]()
$519
This Orbitz deal was found by Cheapflights users on 10/2. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/12:55 pm -
Nonstop9h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Iberia logo]()
$519
This Kiwi.com deal was found by Cheapflights users on 10/4. 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 10/133:40 pm -
1 stop13h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Icelandair logo]()
$520
This Flightnetwork deal was found by Cheapflights users on 10/4. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/157:30 pm -
1 stop24h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Lufthansa logo]()
$520
This Kiwi.com deal was found by Cheapflights users on 10/4. 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.
Wed 1/65:45 pm -
3 stops50h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Multiple Airlines logo]()
$521
This Kiwi.com deal was found by Cheapflights users on 9/30. 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.
Wed 10/219:25 pm -
1 stop28h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Icelandair logo]()
$521
This Kiwi.com deal was found by Cheapflights users on 10/4. 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 11/243:00 pm -
3 stops53h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Multiple Airlines logo]()
$521
This Kiwi.com deal was found by Cheapflights users on 10/4. 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 1/197:50 pm -
3 stops49h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/4![Multiple Airlines logo]()
$522
Find flight deals from London to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Seattle (SEA). 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 October 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $549 (TravelUp) |
One-way from | $518 (Iberia) |
Popular in | August |
Cheapest in | February |
Average price | $723 |
Good round-trip deal | $582 or less |
Good one-way deal | $565 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from London to Seattle 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 October 5, 2026.
Use the filters below to find and compare flights from London to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
LondonSeattle
LGW London Gatwick - SEA Seattle/Tacoma Intl
LGWSEA
London Gatwick
Tue 12/15
10:00 am-10:55 pm
2 stops20h 55m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$528
LondonSeattle
LTN London Luton - SEA Seattle/Tacoma Intl
LTNSEA
London Luton
Fri 1/15
6:35 pm-1:40 pm
2 stops51h 05m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$536
LondonSeattle
LHR London Heathrow - SEA Seattle/Tacoma Intl
LHRSEA
London Heathrow
Thu 11/26
7:30 pm-10:31 pm
2 stops35h 01m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$537
LondonSeattle
LGW London Gatwick - SEA Seattle/Tacoma Intl
LGWSEA
London Gatwick
Wed 2/24
8:05 am-1:40 pm
2 stops37h 35m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$537
LondonSeattle
LTN London Luton - SEA Seattle/Tacoma Intl
LTNSEA
London Luton
Wed 2/24
7:00 am-1:40 pm
2 stops38h 40m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$539
LondonSeattle
LTN London Luton - SEA Seattle/Tacoma Intl
LTNSEA
London Luton
Mon 11/30
2:45 pm-1:40 pm
2 stops54h 55m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$539
LondonSeattle
LHR London Heathrow - SEA Seattle/Tacoma Intl
LHRSEA
London Heathrow
Tue 11/17
4:20 pm-7:17 pm
3 stops34h 57m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$541
LondonSeattle
LGW London Gatwick - SEA Seattle/Tacoma Intl
LGWSEA
London Gatwick
Thu 1/21
4:45 pm-3:13 pm
1 stop30h 28m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$544
LondonSeattle
LGW London Gatwick - SEA Seattle/Tacoma Intl
LGWSEA
London Gatwick
Thu 1/28
4:45 pm-3:13 pm
1 stop30h 28m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$544
LondonSeattle
LGW London Gatwick - SEA Seattle/Tacoma Intl
LGWSEA
London Gatwick
Fri 11/13
9:00 am-11:18 pm
2 stops22h 18m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$551
Showing 1-10 of 60 resultsSorted by cheapest first
Compare providers for flights from London to Seattle
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 London to Seattle in October.
| 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 Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on London-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on London-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub 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 London-Seattle 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 London to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from London with our price prediction graph.
LON-SEA
LGW-SEA
LTN-SEA
LHR-SEA
STN-SEA
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 London to Seattle
LON-SEA
LGW-SEA
LTN-SEA
LHR-SEA
STN-SEA
What is the cheapest month to book a flight from London to Seattle?
Currently, February is the cheapest month in which you can book a flight from London to Seattle (average of $647). Flying from London to Seattle in July is currently the most expensive (average of $858). 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 LON to SEA?
Find hourly flight availability from London to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 5, 2026.
When flying from London to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from London to Seattle
Explore weekly flight availability from London to Seattle. 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 October 5, 2026.
The most flights from LON to SEA are scheduled on a Tuesday (24 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (19 on average).
How much does it cost to fly round-trip from London to Seattle?
Airfare is below average for this route at the moment.
London to Seattle flights typically cost between $592 and $806 in November.The cheapest round-trip price found within the last 5 days was $549 on Icelandair (Nov 3-Nov 15).
How often are flights from London to Seattle delayed?
About 12% of weekly flights between London and Seattle have experienced delays in the past year, with the average delay time being 134 minutes.
What is the most punctual flight time for London to Seattle flights?
Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Sunday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on London to Seattle flights?
Over the last year, Delta 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 London to Seattle?
To ensure you get the cheapest price possible for a flight from London to Seattle, you should look to book at least 83 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
The best insider tips for London to Seattle 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 London to Seattle trip
Our travel experts
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated October 5, 2026.
See what other customers who have flown with Alaska Airlines,Delta, andVirgin Atlantic from London to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
LHR - SEA
Food
7.0
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
LHR - SEA
Food
7.0
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
LHR - SEA
Food
7.0
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
LHR - SEA
Food
7.0
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
LHR - SEA
Food
7.0
Comfort
7.8
Boarding
8.1
Overall
7.9
Crew
8.5
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Jun 2026
LHR - SEA
Related info for your journey
Find useful and relevant information for your journey from London to Seattle. 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 Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ocean Shores
Ellensburg
Issaquah
Marysville
Lakewood
Fife
Poulsbo
Browse thousands of different options on Cheapflights for your next trip
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London and Seattle flights
Browse other London and Seattle flight options. Last updated on October 5, 2026.
Other flights from London
Browse through other flights departing from London. Flights are based on user searches made on Cheapflights and were last updated on October 5, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 5, 2026.
Top 7 airlines flying from London to Seattle
Discover the top 7 airlines that operate flights from London to Seattle. 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 October 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$485 | Average$796 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$534 | Average$810 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$579 | Average$908 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$580 | Average$1,009 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$581 | Average$840 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$618 | Average$1,036 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$714 | Average$919 | FlexibilityNo cancel fee | On-time70% |