$408+ 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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
LON — SEA
Aug 29 — Sep 51
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 July 30, 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 July 30, 2026.
This TravelUp deal was found by Cheapflights users on 7/26. 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
LHR
- SEA
1 stop31h 15m
Icelandair
Tue 10/273:35 pm
SEA
- LHR
1 stop20h 55m
Icelandair
Deal found 7/26![Icelandair logo]()
$602
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 11/412:15 pm
LHR
- SEA
1 stop12h 45m
Multiple Airlines
Mon 11/238:31 am
SEA
- LHR
2 stops15h 34m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$604
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 11/28:35 pm
LHR
- SEA
1 stop28h 25m
Multiple Airlines
Tue 11/248:31 am
SEA
- LHR
2 stops15h 34m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$605
This United Airlines deal was found by Cheapflights users on 7/27. 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 10/310:35 am
LHR
- SEA
1 stop18h 26m
United Airlines
Sat 10/311:14 pm
SEA
- LHR
1 stop23h 41m
United Airlines
Deal found 7/27![United Airlines logo]()
$606
This Gotogate deal was found by Cheapflights users on 7/25. 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.
Tue 8/259:25 pm
LHR
- SEA
1 stop22h 20m
Icelandair
Mon 9/73:40 pm
SEA
- LHR
1 stop12h 15m
Icelandair
Deal found 7/25![Icelandair logo]()
$608
This Mytrip deal was found by Cheapflights users on 7/26. 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 9/244:55 pm
STN
- SEA
2 stops28h 50m
Multiple Airlines
Fri 10/23:55 pm
SEA
- STN
2 stops20h 35m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$611
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Fri 10/28:00 am
LHR
- SEA
2 stops21h 01m
United Airlines
Fri 10/211:14 pm
SEA
- LHR
1 stop23h 41m
United Airlines
Deal found 7/28![United Airlines logo]()
$611
This Gotogate deal was found by Cheapflights users on 7/26. 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.
Tue 9/11:00 pm
LGW
- SEA
1 stop15h 40m
Icelandair
Wed 9/303:40 pm
SEA
- LGW
1 stop15h 00m
Icelandair
Deal found 7/26![Icelandair logo]()
$612
This TravelUp deal was found by Cheapflights users on 7/29. 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 10/2812:15 pm
LHR
- SEA
1 stop12h 45m
Icelandair
Thu 11/52:35 pm
SEA
- LHR
1 stop12h 15m
Icelandair
Deal found 7/29![Icelandair logo]()
$612
This deal was found by Cheapflights users on 7/27. 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.
Tue 9/14:30 pm
LHR
- SEA
Nonstop9h 55m
British Airways
Sat 9/121:30 pm
SEA
- LHR
Nonstop9h 15m
British Airways
Deal found 7/27![British Airways logo]()
$613
This Flightnetwork deal was found by Cheapflights users on 7/26. 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.
Tue 9/83:40 pm
LGW
- SEA
1 stop34h 15m
Icelandair
Tue 9/157:00 pm
SEA
- LGW
1 stop11h 40m
Icelandair
Deal found 7/26![Icelandair logo]()
$615
This Mytrip deal was found by Cheapflights users on 7/26. 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 9/810:45 am
STN
- SEA
2 stops33h 00m
Multiple Airlines
Tue 9/157:00 pm
SEA
- STN
2 stops21h 10m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$615
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 July 30, 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 July 30, 2026.
This United Airlines deal was found by Cheapflights users on 7/28. 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 9/27:30 am
LHR
- SEA
2 stops22h 28m
United Airlines
Thu 9/33:34 pm
SEA
- LHR
1 stop21h 51m
United Airlines
Deal found 7/28![United Airlines logo]()
$688
This Delta deal was found by Cheapflights users on 7/26. 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 10/2712:20 pm
LHR
- SEA
Nonstop10h 34m
Delta
Sun 11/84:50 pm
SEA
- LHR
Nonstop9h 50m
Delta
Deal found 7/26![Delta logo]()
$727
This Virgin Atlantic deal was found by Cheapflights users on 7/25. 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 8/2711:40 am
LHR
- SEA
Nonstop10h 20m
Virgin Atlantic
Thu 9/245:30 pm
SEA
- LHR
Nonstop9h 50m
Virgin Atlantic
Deal found 7/25![Virgin Atlantic logo]()
$751
This Mytrip deal was found by Cheapflights users on 7/26. 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 9/26:15 am
LTN
- SEA
3 stops22h 45m
Multiple Airlines
Wed 9/163:40 pm
SEA
- LTN
2 stops22h 35m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$809
This British Airways deal was found by Cheapflights users on 7/27. 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.
Mon 8/179:50 am
LHR
- SEA
Nonstop9h 45m
British Airways
Wed 9/25:50 am
SEA
- LHR
1 stop19h 15m
British Airways
Deal found 7/27![British Airways logo]()
$915
This Scandinavian Airlines deal was found by Cheapflights users on 7/30. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/3010:20 am
LHR
- PDX
2 stops19h 52m
Scandinavian Airlines
Sun 9/612:25 pm
PDX
- LHR
2 stops25h 15m
Scandinavian Airlines
Deal found 7/30![Scandinavian Airlines logo]()
$918
This Icelandair deal was found by Cheapflights users on 7/28. 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.
Tue 9/83:40 pm
LGW
- PDX
1 stop34h 10m
Icelandair
Thu 9/243:30 pm
PDX
- LGW
1 stop15h 10m
Icelandair
Deal found 7/28![Icelandair logo]()
$954
This SWISS deal was found by Cheapflights users on 7/28. 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.
Thu 9/109:15 am
LCY
- PDX
2 stops21h 37m
SWISS
Thu 9/243:23 pm
PDX
- LCY
2 stops18h 07m
SWISS
Deal found 7/28![SWISS logo]()
$999
This Turkish Airlines deal was found by Cheapflights users on 7/29. 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 11/710:55 am
STN
- SEA
1 stop38h 15m
Turkish Airlines
Sat 11/147:05 pm
SEA
- STN
1 stop30h 50m
Turkish Airlines
Deal found 7/29![Turkish Airlines logo]()
$1,007
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 8/55:00 pm
LHR
- SEA
Nonstop9h 55m
Alaska Airlines
Wed 3/177:55 pm
SEA
- LHR
Nonstop9h 25m
Alaska Airlines
Deal found 7/29![Alaska Airlines logo]()
$1,011
This Aer Lingus deal was found by Cheapflights users on 7/29. 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 Aer Lingus is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/47:40 am
LHR
- SEA
1 stop17h 30m
Aer Lingus
Wed 8/127:10 pm
SEA
- LHR
1 stop12h 50m
Aer Lingus
Deal found 7/29![Aer Lingus logo]()
$1,079
This KLM deal was found by Cheapflights users on 7/26. 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.
Sat 9/1910:00 am
LCY
- SEA
1 stop14h 35m
KLM
Sun 10/41:45 pm
SEA
- LCY
1 stop11h 45m
KLM
Deal found 7/26![KLM logo]()
$1,124
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/266:50 am
LHR
- SEA
2 stops20h 02m
United Airlines
Sun 9/278:25 am
SEA
- LHR
1 stop14h 30m
United Airlines
Deal found 7/29![United Airlines logo]()
$713
This Virgin Atlantic deal was found by Cheapflights users on 7/30. 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.
Sat 10/1010:25 am
LGW
- SEA
2 stops20h 39m
Virgin Atlantic
Tue 11/107:15 am
SEA
- LGW
2 stops24h 30m
Virgin Atlantic
Deal found 7/30![Virgin Atlantic logo]()
$754
This Delta deal was found by Cheapflights users on 7/28. 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 9/1510:35 am
LGW
- SEA
1 stop15h 13m
Delta
Fri 9/251:30 pm
SEA
- LGW
1 stop11h 55m
Delta
Deal found 7/28![Delta logo]()
$761
This United Airlines deal was found by Cheapflights users on 7/28. 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 8/256:50 am
LHR
- SEA
2 stops19h 51m
United Airlines
Tue 9/15:00 am
SEA
- LHR
2 stops18h 15m
United Airlines
Deal found 7/28![United Airlines logo]()
$750
This Mytrip deal was found by Cheapflights users on 7/26. 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 9/96:10 am
LTN
- SEA
2 stops20h 35m
Multiple Airlines
Wed 9/163:40 pm
SEA
- LTN
2 stops22h 35m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$828
This Condor deal was found by Cheapflights users on 7/28. 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.
Thu 10/2210:20 am
LGW
- SEA
1 stop13h 40m
Condor
Mon 10/266:50 pm
SEA
- LGW
1 stop17h 30m
Condor
Deal found 7/28![Condor logo]()
$1,663
This Virgin Atlantic deal was found by Cheapflights users on 7/27. 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 9/910:25 am
LGW
- SEA
2 stops19h 40m
Virgin Atlantic
Wed 9/236:45 pm
SEA
- LGW
1 stop13h 15m
Virgin Atlantic
Deal found 7/27![Virgin Atlantic logo]()
$759
This Virgin Atlantic deal was found by Cheapflights users on 7/30. 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.
Sat 10/108:25 am
LCY
- SEA
1 stop16h 10m
Virgin Atlantic
Tue 11/102:35 pm
SEA
- LCY
1 stop18h 45m
Virgin Atlantic
Deal found 7/30![Virgin Atlantic logo]()
$767
This Scandinavian Airlines deal was found by Cheapflights users on 7/26. 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 8/216:40 am
LHR
- PDX
2 stops21h 04m
Scandinavian Airlines
Sat 9/51:42 pm
PDX
- LHR
2 stops23h 58m
Scandinavian Airlines
Deal found 7/26![Scandinavian Airlines logo]()
$958
This Mytrip deal was found by Cheapflights users on 7/29. 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 8/196:10 pm
LTN
- SEA
3 stops47h 30m
Multiple Airlines
Mon 8/247:00 pm
SEA
- LTN
2 stops17h 55m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$878
This British Airways deal was found by Cheapflights users on 7/27. 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.
Thu 9/103:40 pm
LHR
- PDX
Nonstop10h 00m
British Airways
Wed 9/237:30 pm
PDX
- LHR
Nonstop9h 30m
British Airways
Deal found 7/27![British Airways logo]()
$999
This TAP AIR PORTUGAL deal was found by Cheapflights users on 7/27. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:50 pm
LHR
- SEA
3 stops46h 43m
TAP AIR PORTUGAL
Sat 9/1911:55 pm
SEA
- LHR
2 stops26h 25m
TAP AIR PORTUGAL
Deal found 7/27![TAP AIR PORTUGAL logo]()
$2,035
This Turkish Airlines deal was found by Cheapflights users on 7/25. 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 11/1110:55 am
STN
- SEA
1 stop38h 15m
Turkish Airlines
Sun 11/157:05 pm
SEA
- STN
1 stop37h 15m
Turkish Airlines
Deal found 7/25![Turkish Airlines logo]()
$1,024
This Virgin Atlantic deal was found by Cheapflights users on 7/27. 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 9/99:20 am
LCY
- SEA
1 stop15h 15m
Virgin Atlantic
Wed 9/235:45 pm
SEA
- LCY
1 stop16h 45m
Virgin Atlantic
Deal found 7/27![Virgin Atlantic logo]()
$771
This Icelandair deal was found by Cheapflights users on 7/27. 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 9/163:40 pm
LGW
- SEA
1 stop34h 15m
Icelandair
Sat 9/193:40 pm
SEA
- LGW
1 stop14h 55m
Icelandair
Deal found 7/27![Icelandair logo]()
$1,042
This Scandinavian Airlines deal was found by Cheapflights users on 7/26. 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 8/286:40 am
LHR
- PDX
2 stops24h 04m
Scandinavian Airlines
Sat 9/51:42 pm
PDX
- LHR
2 stops20h 48m
Scandinavian Airlines
Deal found 7/26![Scandinavian Airlines logo]()
$964
This SWISS deal was found by Cheapflights users on 7/30. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/39:15 am
LCY
- PDX
2 stops21h 37m
SWISS
Wed 9/167:02 am
PDX
- LCY
2 stops21h 33m
SWISS
Deal found 7/30![SWISS logo]()
$1,067
This Kiwi.com deal was found by Cheapflights users on 7/30. 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.
Mon 11/238:00 am
LTN
- PDX
1 stop17h 00m
Multiple Airlines
Mon 11/302:45 pm
PDX
- LTN
1 stop15h 20m
Multiple Airlines
Deal found 7/30![Multiple Airlines logo]()
$882
Last-minute flights from London to WashingtonDiscover last-minute flight deals from London to Washington. Data last updated July 30, 2026 and is based on user searches.
Discover last-minute flight deals from London to Washington. Data last updated July 30, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 7/29. 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.
Fri 8/219:25 pm
LHR
- SEA
1 stop22h 20m
Icelandair
Tue 9/227:00 pm
SEA
- LHR
1 stop17h 20m
Icelandair
Deal found 7/29![Icelandair logo]()
$649
This Icelandair deal was found by Cheapflights users on 7/29. 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.
Sun 8/233:40 pm
LGW
- SEA
1 stop28h 05m
Icelandair
Thu 7/17:00 pm
SEA
- LGW
1 stop11h 40m
Icelandair
Deal found 7/29![Icelandair logo]()
$654
This Gotogate deal was found by Cheapflights users on 7/26. 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.
Mon 8/249:25 pm
LHR
- SEA
1 stop22h 20m
Icelandair
Wed 9/93:40 pm
SEA
- LHR
1 stop20h 40m
Icelandair
Deal found 7/26![Icelandair logo]()
$616
This TravelUp deal was found by Cheapflights users on 7/27. 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 8/249:25 pm
LHR
- SEA
1 stop22h 20m
Icelandair
Tue 9/157:00 pm
SEA
- LHR
1 stop17h 20m
Icelandair
Deal found 7/27![Icelandair logo]()
$621
This TravelUp deal was found by Cheapflights users on 7/27. 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 8/243:40 pm
LGW
- SEA
1 stop28h 05m
Icelandair
Tue 9/157:00 pm
SEA
- LGW
1 stop11h 40m
Icelandair
Deal found 7/27![Icelandair logo]()
$622
This Gotogate deal was found by Cheapflights users on 7/28. 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.
Mon 8/243:40 pm
LGW
- SEA
1 stop13h 00m
Icelandair
Mon 9/147:00 pm
SEA
- LGW
1 stop11h 40m
Icelandair
Deal found 7/28![Icelandair logo]()
$639
This Gotogate deal was found by Cheapflights users on 7/25. 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.
Tue 8/259:25 pm
LHR
- SEA
1 stop22h 20m
Icelandair
Mon 9/73:40 pm
SEA
- LHR
1 stop12h 15m
Icelandair
Deal found 7/25![Icelandair logo]()
$608
This The Travel House deal was found by Cheapflights users on 7/27. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/259:25 pm
LHR
- SEA
1 stop22h 20m
Icelandair
Tue 9/811:25 pm
SEA
- LHR
1 stop12h 55m
Icelandair
Deal found 7/27![Icelandair logo]()
$627
This TravelUp deal was found by Cheapflights users on 7/26. 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 8/313:40 pm
LGW
- SEA
1 stop13h 00m
Icelandair
Wed 9/93:40 pm
SEA
- LGW
1 stop15h 00m
Icelandair
Deal found 7/26![Icelandair logo]()
$620
This The Travel House deal was found by Cheapflights users on 7/26. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/319:25 pm
LHR
- SEA
1 stop22h 20m
Icelandair
Thu 9/107:00 pm
SEA
- LHR
1 stop17h 20m
Icelandair
Deal found 7/26![Icelandair logo]()
$632
This oojo deal was found by Cheapflights users on 7/26. 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.
Mon 8/313:40 pm
LGW
- SEA
1 stop13h 00m
Icelandair
Wed 9/163:40 pm
SEA
- LGW
1 stop15h 00m
Icelandair
Deal found 7/26![Icelandair logo]()
$634
This Gotogate deal was found by Cheapflights users on 7/26. 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.
Mon 8/319:25 pm
LHR
- SEA
1 stop22h 20m
Icelandair
Wed 9/163:40 pm
SEA
- LHR
1 stop12h 15m
Icelandair
Deal found 7/26![Icelandair logo]()
$634
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 July 30, 2026.
Search for one-way flight options from London to Washington. Find affordable one-way fares based on user searches. Data last updated July 30, 2026.
This deal was found by Cheapflights users on 7/25. 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.
Wed 11/1112:15 pm
LHR
- PDX
1 stop12h 45m
Icelandair
Deal found 7/25![Icelandair logo]()
$408
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 10/42:00 pm
LGW
- PDX
2 stops34h 35m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$434
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Sat 9/122:00 pm
LGW
- PDX
2 stops58h 35m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$449
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 9/153:10 pm
STN
- PDX
3 stops37h 40m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$458
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 9/152:45 pm
LTN
- PDX
3 stops38h 05m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$458
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 10/68:25 pm
STN
- PDX
3 stops47h 14m
Multiple Airlines
Deal found 7/29![Multiple Airlines logo]()
$463
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 8/279:10 pm
LHR
- PDX
3 stops48h 40m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$469
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 10/22:00 pm
LGW
- PDX
2 stops29h 36m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$472
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 8/287:40 am
LHR
- PDX
3 stops38h 10m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$480
This Norse deal was found by Cheapflights users on 7/28. 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/32:00 pm
LGW
- PDX
1 stop38h 12m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$482
This Kiwi.com deal was found by Cheapflights users on 7/28. 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 11/235:45 pm
STN
- PDX
3 stops58h 47m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$486
This deal was found by Cheapflights users on 7/25. 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.
Wed 11/111:35 pm
LHR
- PDX
Nonstop10h 15m
British Airways
Deal found 7/25![British Airways logo]()
$490
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 July 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $602 (TravelUp) |
One-way from | $408 |
Popular in | December |
Cheapest in | February |
Average price | $833 |
Good round-trip deal | $792 or less |
Good one-way deal | $637 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 July 30, 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 9/2
7:30 am-9:58 pm
2 stops22h 28m
Seattle/Tacoma Intl
Thu 9/3
3:34 pm-9:25 pm
1 stop21h 51m
$688
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Sat 9/26
6:50 am-6:52 pm
2 stops20h 02m
Seattle/Tacoma Intl
Sun 9/27
8:25 am-6:55 am
1 stop14h 30m
$713
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Tue 10/27
12:20 pm-3:54 pm
Nonstop10h 34m
Seattle/Tacoma Intl
Sun 11/8
4:50 pm-10:40 am
Nonstop9h 50m
$727
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Tue 8/25
6:50 am-6:41 pm
2 stops19h 51m
Seattle/Tacoma Intl
Tue 9/1
5:00 am-7:15 am
2 stops18h 15m
$750
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
Thu 8/27
11:40 am-2:00 pm
Nonstop10h 20m
Seattle/Tacoma Intl
Thu 9/24
5:30 pm-11:20 am
Nonstop9h 50m
$751
LondonSeattle
LGW - SEA
LGWSEA
London Gatwick
Sat 10/10
10:25 am-11:04 pm
2 stops20h 39m
Seattle/Tacoma Intl
Tue 11/10
7:15 am-3:45 pm
2 stops24h 30m
$754
LondonSeattle
LGW - SEA
LGWSEA
London Gatwick
Wed 9/9
10:25 am-10:05 pm
2 stops19h 40m
Seattle/Tacoma Intl
Wed 9/23
6:45 pm-4:00 pm
1 stop13h 15m
$759
LondonSeattle
LGW - SEA
LGWSEA
London Gatwick
Tue 9/15
10:35 am-5:48 pm
1 stop15h 13m
Seattle/Tacoma Intl
Fri 9/25
1:30 pm-9:25 am
1 stop11h 55m
$761
LondonSeattle
LCY - SEA
LCYSEA
London City
Sat 10/10
8:25 am-4:35 pm
1 stop16h 10m
Seattle/Tacoma Intl
Tue 11/10
2:35 pm-5:20 pm
1 stop18h 45m
$767
LondonSeattle
LCY - SEA
LCYSEA
London City
Wed 9/9
9:20 am-4:35 pm
1 stop15h 15m
Seattle/Tacoma Intl
Wed 9/23
5:45 pm-6:30 pm
1 stop16h 45m
$771
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.
LHR-SEA
LTN-SEA
LHR-PDX
LGW-PDX
LCY-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
LHR-SEA
LTN-SEA
LHR-PDX
LGW-PDX
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 $664). Flying from London to State of Washington in December is currently the most expensive (average of $881). 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 July 30, 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 July 30, 2026.
The most flights from LON to USWA are scheduled on a Wednesday (24 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (12 on average).
How much does it cost to fly round-trip from London to State of Washington?
Airfare is below average for this route at the moment.
London to State of Washington flights typically cost between $701 and $914 in October.The cheapest round-trip price found within the last 5 days was $602 on Icelandair (Oct 19-Oct 27).
How far ahead should I book a flight from London to State of Washington?
Booking 80 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to State of Washington. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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 July 30, 2026.
Read through reviews of airlines operating flights from London to Washington, such as Delta,Air France, andVirgin Atlantic. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.8
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
Comfort
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.8
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
Comfort
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.8
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
Comfort
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.8
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
Comfort
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.8
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
Comfort
7.8
Entertainment
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Overall
7.8
Reviews
1 / 20
8.0
ExcellentRakshith,May 2026
TPE - SEA
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for London to Washington
See prices for flight routes from nearby airports that may be better suited for you.
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 July 30, 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 7 airlines flying from London to Washington
Discover the top 7 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 July 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$485 | Average$796 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$534 | Average$782 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$536 | Average$1,012 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$618 | Average$985 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$660 | Average$900 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$670 | Average$908 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$759 | Average$857 | FlexibilityNo cancel fee | On-time75% |