$394+ Cheap flights from London (LON) to Washington
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
May 18 — May 251
Round-trip
1 adult, Economy
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Cheapest flights from London to WashingtonExplore the most affordable flight options available from London to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 18, 2026.
Explore the most affordable flight options available from London to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 4/226:30 am
STN
- SEA
1 stop18h 40m
Multiple Airlines
Sun 4/267:10 pm
SEA
- STN
1 stop20h 15m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$692
This TravelTrolley deal was found by Cheapflights users on 4/13. 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 TravelTrolley is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/15:45 pm
LHR
- SEA
Nonstop10h 18m
Virgin Atlantic
Fri 7/107:15 am
SEA
- LHR
1 stop15h 05m
Virgin Atlantic
Deal found 4/13![Virgin Atlantic logo]()
$693
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/273:40 pm
LGW
- SEA
1 stop13h 00m
Icelandair
Sat 5/27:00 pm
SEA
- LGW
1 stop11h 35m
Icelandair
Deal found 4/14![Icelandair logo]()
$694
This Trip.com deal was found by Cheapflights users on 4/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/222:10 pm
LHR
- SEA
1 stop32h 09m
Multiple Airlines
Sun 4/267:00 pm
SEA
- LHR
2 stops16h 55m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$694
This oojo deal was found by Cheapflights users on 4/14. 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 8/253:40 pm
LGW
- SEA
1 stop13h 00m
Icelandair
Tue 9/87:00 pm
SEA
- LGW
1 stop11h 40m
Icelandair
Deal found 4/14![Icelandair logo]()
$695
This FlightHub deal was found by Cheapflights users on 4/16. 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 5/273:40 pm
LGW
- SEA
1 stop28h 05m
Icelandair
Thu 10/17:00 pm
SEA
- LGW
1 stop11h 40m
Icelandair
Deal found 4/16![Icelandair logo]()
$696
This Trip.com deal was found by Cheapflights users on 4/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/233:40 pm
LGW
- SEA
1 stop13h 00m
Icelandair
Thu 9/247:00 pm
SEA
- LGW
1 stop11h 40m
Icelandair
Deal found 4/14![Icelandair logo]()
$697
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 10/71:05 pm
LHR
- SEA
1 stop12h 50m
Icelandair
Wed 10/143:40 pm
SEA
- LHR
1 stop12h 15m
Icelandair
Deal found 4/14![Icelandair logo]()
$697
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 4/226:15 am
LTN
- SEA
1 stop18h 55m
Multiple Airlines
Sun 4/267:10 pm
SEA
- LTN
1 stop18h 30m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$697
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/13:40 pm
LGW
- SEA
1 stop13h 00m
Icelandair
Tue 5/127:00 pm
SEA
- LGW
1 stop11h 40m
Icelandair
Deal found 4/14![Icelandair logo]()
$698
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/19:50 am
LHR
- SEA
Nonstop9h 45m
British Airways
Wed 5/68:20 pm
SEA
- LHR
Nonstop9h 25m
British Airways
Deal found 4/14![British Airways logo]()
$698
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/13:40 pm
LGW
- SEA
1 stop13h 00m
Icelandair
Mon 5/113:40 pm
SEA
- LGW
1 stop15h 00m
Icelandair
Deal found 4/14![Icelandair logo]()
$699
Best flights from London to WashingtonDiscover carefully curated flight deals from London to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 18, 2026.
Discover carefully curated flight deals from London to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 18, 2026.
This British Airways deal was found by Cheapflights users on 4/17. 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 6/104:30 pm
LHR
- SEA
Nonstop9h 55m
British Airways
Mon 6/156:00 am
SEA
- LHR
1 stop19h 05m
British Airways
Deal found 4/17![British Airways logo]()
$747
This KLM deal was found by Cheapflights users on 4/15. 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.
Tue 5/196:30 am
LHR
- SEA
1 stop13h 12m
KLM
Mon 5/256:20 pm
SEA
- LHR
Nonstop9h 50m
KLM
Deal found 4/15![KLM logo]()
$753
This Mytrip deal was found by Cheapflights users on 4/16. 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.
Fri 5/156:20 am
LTN
- SEA
1 stop18h 50m
Multiple Airlines
Sat 5/237:10 pm
SEA
- LTN
1 stop18h 45m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$755
This Delta deal was found by Cheapflights users on 4/14. 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 6/176:30 am
LHR
- SEA
1 stop13h 07m
Delta
Fri 7/176:00 am
SEA
- LHR
1 stop17h 15m
Delta
Deal found 4/14![Delta logo]()
$761
This Virgin Atlantic deal was found by Cheapflights users on 4/16. 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 6/110:25 am
LGW
- SEA
2 stops21h 28m
Virgin Atlantic
Thu 6/111:30 pm
SEA
- LGW
1 stop11h 55m
Virgin Atlantic
Deal found 4/16![Virgin Atlantic logo]()
$779
This Scandinavian Airlines deal was found by Cheapflights users on 4/16. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/289:05 pm
LHR
- SEA
2 stops24h 40m
Scandinavian Airlines
Sat 6/63:55 pm
SEA
- LHR
2 stops16h 30m
Scandinavian Airlines
Deal found 4/16![Scandinavian Airlines logo]()
$780
This Cheapflightsfares deal was found by Cheapflights users on 4/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2510:20 am
LGW
- SEA
1 stop13h 20m
Condor
Wed 9/25:40 pm
SEA
- LGW
1 stop13h 05m
Condor
Deal found 4/13![Condor logo]()
$867
This SWISS deal was found by Cheapflights users on 4/15. 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.
Tue 8/259:25 am
LGW
- SEA
2 stops19h 18m
SWISS
Wed 10/217:00 am
SEA
- LGW
2 stops17h 25m
SWISS
Deal found 4/15![SWISS logo]()
$896
This United Airlines deal was found by Cheapflights users on 4/13. 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.
Wed 9/93:05 pm
LHR
- PDX
1 stop26h 26m
United Airlines
Sun 9/138:29 am
PDX
- LHR
2 stops38h 01m
United Airlines
Deal found 4/13![United Airlines logo]()
$966
This Turkish Airlines deal was found by Cheapflights users on 4/13. 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 10/85:35 pm
STN
- SEA
1 stop31h 40m
Turkish Airlines
Thu 10/157:10 pm
SEA
- STN
1 stop30h 45m
Turkish Airlines
Deal found 4/13![Turkish Airlines logo]()
$972
This Travcart deal was found by Cheapflights users on 4/13. 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 Travcart is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/263:40 pm
LGW
- PDX
1 stop28h 05m
Icelandair
Sat 7/113:30 pm
PDX
- LGW
1 stop15h 05m
Icelandair
Deal found 4/13![Icelandair logo]()
$1,077
This British Airways deal was found by Cheapflights users on 4/15. 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.
Tue 10/69:50 am
LHR
- SEA
Nonstop9h 45m
British Airways
Tue 10/137:40 am
SEA
- LHR
1 stop17h 20m
British Airways
Deal found 4/15![British Airways logo]()
$763
This KLM deal was found by Cheapflights users on 4/16. 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.
Thu 5/289:55 am
LHR
- SEA
1 stop14h 35m
KLM
Sat 6/66:20 pm
SEA
- LHR
Nonstop9h 50m
KLM
Deal found 4/16![KLM logo]()
$770
This Delta deal was found by Cheapflights users on 4/15. 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 6/1110:25 am
LGW
- SEA
1 stop15h 05m
Delta
Sun 6/146:50 pm
SEA
- LGW
1 stop13h 10m
Delta
Deal found 4/15![Delta logo]()
$774
This Virgin Atlantic deal was found by Cheapflights users on 4/16. 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 6/410:25 am
LGW
- SEA
2 stops21h 28m
Virgin Atlantic
Sat 6/131:30 pm
SEA
- LGW
1 stop11h 50m
Virgin Atlantic
Deal found 4/16![Virgin Atlantic logo]()
$799
This Mytrip deal was found by Cheapflights users on 4/15. 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.
Wed 4/296:15 am
LTN
- SEA
3 stops35h 25m
Multiple Airlines
Sat 5/27:00 pm
SEA
- LTN
2 stops18h 00m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$815
This KLM deal was found by Cheapflights users on 4/13. 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 10/96:30 am
LHR
- SEA
1 stop13h 22m
KLM
Fri 10/161:30 pm
SEA
- LHR
1 stop12h 30m
KLM
Deal found 4/13![KLM logo]()
$772
This Delta deal was found by Cheapflights users on 4/15. 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 8/256:15 am
LHR
- SEA
1 stop13h 00m
Delta
Wed 9/26:55 pm
SEA
- LHR
1 stop14h 40m
Delta
Deal found 4/15![Delta logo]()
$775
This British Airways deal was found by Cheapflights users on 4/16. 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 8/129:50 am
LHR
- SEA
Nonstop9h 45m
British Airways
Wed 8/263:10 pm
SEA
- LHR
1 stop13h 05m
British Airways
Deal found 4/16![British Airways logo]()
$777
This SWISS deal was found by Cheapflights users on 4/16. 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.
Wed 5/279:15 am
LCY
- SEA
2 stops19h 38m
SWISS
Thu 10/12:52 pm
SEA
- LCY
2 stops18h 38m
SWISS
Deal found 4/16![SWISS logo]()
$916
This Virgin Atlantic deal was found by Cheapflights users on 4/17. 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.
Wed 7/155:00 pm
LGW
- SEA
1 stop26h 15m
Virgin Atlantic
Wed 7/225:20 am
SEA
- LGW
2 stops20h 05m
Virgin Atlantic
Deal found 4/17![Virgin Atlantic logo]()
$833
This Mytrip deal was found by Cheapflights users on 4/14. 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.
Fri 5/295:40 am
LTN
- SEA
2 stops23h 00m
Multiple Airlines
Fri 6/53:40 pm
SEA
- LTN
2 stops24h 10m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$835
This Delta deal was found by Cheapflights users on 4/17. 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 9/36:30 am
LHR
- SEA
1 stop13h 17m
Delta
Thu 9/179:50 am
SEA
- LHR
1 stop18h 25m
Delta
Deal found 4/17![Delta logo]()
$780
This Scandinavian Airlines deal was found by Cheapflights users on 4/14. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:05 am
LHR
- PDX
2 stops21h 55m
Scandinavian Airlines
Mon 2/87:00 am
PDX
- LHR
3 stops25h 25m
Scandinavian Airlines
Deal found 4/14![Scandinavian Airlines logo]()
$952
This KLM deal was found by Cheapflights users on 4/16. 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 5/1310:00 am
LCY
- SEA
1 stop14h 30m
KLM
Thu 5/211:45 pm
SEA
- LCY
1 stop11h 45m
KLM
Deal found 4/16![KLM logo]()
$818
This Condor deal was found by Cheapflights users on 4/17. 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.
Tue 4/2810:20 am
LGW
- SEA
1 stop13h 20m
Condor
Wed 5/67:04 pm
SEA
- LGW
2 stops35h 36m
Condor
Deal found 4/17![Condor logo]()
$997
This Virgin Atlantic deal was found by Cheapflights users on 4/17. 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.
Sat 9/1910:00 am
LCY
- SEA
2 stops18h 29m
Virgin Atlantic
Tue 9/295:40 pm
SEA
- LCY
1 stop15h 40m
Virgin Atlantic
Deal found 4/17![Virgin Atlantic logo]()
$833
This Turkish Airlines deal was found by Cheapflights users on 4/17. 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 6/2210:50 am
STN
- SEA
1 stop38h 25m
Turkish Airlines
Sat 7/1112:35 pm
SEA
- STN
1 stop20h 05m
Turkish Airlines
Deal found 4/17![Turkish Airlines logo]()
$1,020
This SWISS deal was found by Cheapflights users on 4/17. 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.
Tue 9/19:25 am
LGW
- PDX
2 stops19h 25m
SWISS
Tue 9/157:00 am
PDX
- LGW
2 stops17h 25m
SWISS
Deal found 4/17![SWISS logo]()
$940
This Mytrip deal was found by Cheapflights users on 4/17. 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.
Fri 5/16:20 am
LTN
- SEA
2 stops22h 48m
Multiple Airlines
Mon 5/43:40 pm
SEA
- LTN
3 stops25h 30m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$856
Last-minute flights from London to WashingtonDiscover last-minute flight deals from London to Washington. Data last updated April 18, 2026 and is based on user searches.
Discover last-minute flight deals from London to Washington. Data last updated April 18, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 4/226:30 am
STN
- SEA
1 stop18h 40m
Multiple Airlines
Sun 4/267:10 pm
SEA
- STN
1 stop20h 15m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$692
This Trip.com deal was found by Cheapflights users on 4/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/222:10 pm
LHR
- SEA
1 stop32h 09m
Multiple Airlines
Sun 4/267:00 pm
SEA
- LHR
2 stops16h 55m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$694
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 4/226:15 am
LTN
- SEA
1 stop18h 55m
Multiple Airlines
Sun 4/267:10 pm
SEA
- LTN
1 stop18h 30m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$697
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/273:40 pm
LGW
- SEA
1 stop13h 00m
Icelandair
Sat 5/27:00 pm
SEA
- LGW
1 stop11h 35m
Icelandair
Deal found 4/14![Icelandair logo]()
$694
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/13:40 pm
LGW
- SEA
1 stop13h 00m
Icelandair
Tue 5/127:00 pm
SEA
- LGW
1 stop11h 40m
Icelandair
Deal found 4/14![Icelandair logo]()
$698
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/19:50 am
LHR
- SEA
Nonstop9h 45m
British Airways
Wed 5/68:20 pm
SEA
- LHR
Nonstop9h 25m
British Airways
Deal found 4/14![British Airways logo]()
$698
This deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/13:40 pm
LGW
- SEA
1 stop13h 00m
Icelandair
Mon 5/113:40 pm
SEA
- LGW
1 stop15h 00m
Icelandair
Deal found 4/14![Icelandair logo]()
$699
This Mytrip deal was found by Cheapflights users on 4/16. 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 5/26:35 am
STN
- SEA
3 stops35h 05m
Multiple Airlines
Tue 5/53:40 pm
SEA
- STN
3 stops22h 20m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$700
This Mytrip deal was found by Cheapflights users on 4/13. 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 5/76:30 am
STN
- SEA
3 stops35h 10m
Multiple Airlines
Thu 5/141:30 pm
SEA
- STN
2 stops25h 25m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$699
This SmartFares deal was found by Cheapflights users on 4/16. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1611:40 am
LHR
- SEA
Nonstop10h 20m
Virgin Atlantic
Mon 6/16:20 pm
SEA
- LHR
Nonstop9h 50m
Virgin Atlantic
Deal found 4/16![Virgin Atlantic logo]()
$699
This Travcart deal was found by Cheapflights users on 4/17. 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 Travcart is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:20 am
LHR
- SEA
1 stop22h 38m
Finnair
Mon 6/18:20 pm
SEA
- LHR
Nonstop9h 25m
Finnair
Deal found 4/17![Finnair logo]()
$700
This FlightHub deal was found by Cheapflights users on 4/16. 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 5/273:40 pm
LGW
- SEA
1 stop28h 05m
Icelandair
Thu 10/17:00 pm
SEA
- LGW
1 stop11h 40m
Icelandair
Deal found 4/16![Icelandair logo]()
$696
One-way flights from London to WashingtonSearch for one-way flight options from London to Washington. Find affordable one-way fares based on user searches. Data last updated April 18, 2026.
Search for one-way flight options from London to Washington. Find affordable one-way fares based on user searches. Data last updated April 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 6/45:35 pm
STN
- PDX
2 stops50h 15m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$394
This Kiwi.com deal was found by Cheapflights users on 4/18. 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 5/1910:00 pm
STN
- PDX
2 stops47h 50m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$401
This Kiwi.com deal was found by Cheapflights users on 4/18. 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 5/194:10 pm
LTN
- PDX
2 stops53h 40m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$401
This Kiwi.com deal was found by Cheapflights users on 4/18. 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 5/199:35 pm
LGW
- PDX
2 stops48h 15m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$402
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/208:30 am
STN
- PDX
3 stops37h 20m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$407
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 6/28:25 pm
STN
- PDX
3 stops47h 25m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$409
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 6/48:35 pm
LTN
- PDX
3 stops47h 15m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$422
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 6/49:50 pm
LGW
- PDX
3 stops46h 00m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$432
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 4/288:30 am
STN
- PDX
2 stops37h 20m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$435
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 4/289:40 am
LTN
- PDX
2 stops36h 10m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$435
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 4/288:50 am
LGW
- PDX
2 stops37h 00m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$435
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/208:30 am
LTN
- PDX
3 stops37h 20m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$443
Find flight deals from London to Washington
Keep the following information in mind while searching for London to Washington flight deals. Data was last updated April 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $685 (Gotogate) |
One-way from | $394 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $723 |
Good round-trip deal | $869 or less |
Good one-way deal | $658 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from London to Washington 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 2,558,603 searches. Data last updated April 18, 2026.
Use the filters below to find and compare flights from London to Washington that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Wed 6/10
4:30 pm-6:25 pm
Nonstop9h 55m
Seattle/Tacoma Intl
Mon 6/15
6:00 am-9:05 am
1 stop19h 05m
$747
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Tue 5/19
6:30 am-11:42 am
1 stop13h 12m
Seattle/Tacoma Intl
Mon 5/25
6:20 pm-12:10 pm
Nonstop9h 50m
$753
LondonSeattle
LTN - SEA
LTNSEA
London Luton
Fri 5/15
6:20 am-5:10 pm
1 stop18h 50m
Seattle/Tacoma Intl
Sat 5/23
7:10 pm-9:55 pm
1 stop18h 45m
$755
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Wed 6/17
6:30 am-11:37 am
1 stop13h 07m
Seattle/Tacoma Intl
Fri 7/17
6:00 am-7:15 am
1 stop17h 15m
$761
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Tue 10/6
9:50 am-11:35 am
Nonstop9h 45m
Seattle/Tacoma Intl
Tue 10/13
7:40 am-9:00 am
1 stop17h 20m
$763
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Thu 5/28
9:55 am-4:30 pm
1 stop14h 35m
Seattle/Tacoma Intl
Sat 6/6
6:20 pm-12:10 pm
Nonstop9h 50m
$770
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Fri 10/9
6:30 am-11:52 am
1 stop13h 22m
Seattle/Tacoma Intl
Fri 10/16
1:30 pm-10:00 am
1 stop12h 30m
$772
LondonSeattle
LGW - SEA
LGWSEA
London Gatwick
Thu 6/11
10:25 am-5:30 pm
1 stop15h 05m
Seattle/Tacoma Intl
Sun 6/14
6:50 pm-4:00 pm
1 stop13h 10m
$774
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Tue 8/25
6:15 am-11:15 am
1 stop13h 00m
Seattle/Tacoma Intl
Wed 9/2
6:55 pm-5:35 pm
1 stop14h 40m
$775
Quickest round-trip
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Wed 8/12
9:50 am-11:35 am
Nonstop9h 45m
Seattle/Tacoma Intl
Wed 8/26
3:10 pm-12:15 pm
1 stop13h 05m
$777
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from London to Washington
Have a flexible travel schedule? Discover the best time to fly to Washington from London with our price prediction graph.
STN-PDX
STN-SEA
LHR-SEA
LGW-SEA
LGW-PDX
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 Washington
LON-USWA
STN-PDX
STN-SEA
LHR-SEA
LGW-SEA
What is the cheapest month to book a flight from London to State of Washington?
Currently, February is the cheapest month in which you can book a flight from London to State of Washington (average of $390). Flying from London to State of Washington in October is currently the most expensive (average of $4,187). 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 WA?
Find hourly flight availability from London to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 18, 2026.
When flying from London to State of Washington, 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 State of Washington
Explore weekly flight availability from London to Washington. 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 April 18, 2026.
The most flights from LON to USWA are scheduled on a Monday (21 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (16 on average).
How much does it cost to fly round-trip from London to State of Washington?
Reviews of airlines servicing Washington
Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated April 18, 2026.
Read through reviews of airlines operating flights from London to Washington, such as Delta,Virgin Atlantic, andAir France. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Food
7.2
Overall
7.9
Comfort
7.9
Crew
8.5
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Food
7.2
Overall
7.9
Comfort
7.9
Crew
8.5
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Food
7.2
Overall
7.9
Comfort
7.9
Crew
8.5
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Food
7.2
Overall
7.9
Comfort
7.9
Crew
8.5
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Food
7.2
Overall
7.9
Comfort
7.9
Crew
8.5
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Entertainment
7.8
Food
7.2
Overall
7.9
Comfort
7.9
Crew
8.5
Boarding
8.1
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from London to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for London to Washington
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Complete your trip
Complete your trip to Washington by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from London to Washington by cabin class
Find flights from London to Washington, based on your preferred cabin class, be it economy, premium economy, business, or first class.
London and Washington flights
Browse other London and Washington flight options. Last updated on April 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
London to Washington flights
Consider these flights traveling from London to Washington.
Top 5 airlines flying from London to Washington
Discover the top 5 airlines that operate flights from London to Washington. 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 2,558,603 searches. Data last updated April 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$403 | Average$625 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$574 | Average$895 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$594 | Average$1,009 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$618 | Average$985 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$671 | Average$874 | FlexibilityNo cancel fee | On-time70% |