Cheap flights to Washington – Compare and Save

— SEA
6 Nov — 13 Nov1
1 adult
1 adult, Economy

Flights to Washington in 2025

Find the latest flights to Washington in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 7 October 2025.

Return from

£440

One-way from

£306

Popular in

July

Cheapest in

January

Average price

£532

Good round-trip deal

£495 or less

Good one-way deal

£564 or less
Icelandair
  • Icelandair
  • 14/12-6/1
  • 2 total stops
  • 25h 25m total
  • London to Seattle
14/12
  • 14/12
  • 2 total stops
  • 37h 40m total
  • London to Washington
Highest demand for flights based on searches. 12% potential increase in price (£59 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Average for return flights in October 2025
Price to beat on a round-trip flight from London to Washington.
Price to beat on a one-way flight from London to Washington.

Find flights to Washington

Browse one-way and return flights deals to Washington on Cheapflights. Flight deals are based on user searches and were last updated on 7 October 2025
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Cheapest flights to Washington
Explore the most affordable flight options available to Washington. Find the lowest fares based on data from user searches, with prices last updated on 7 October 2025.

Sun 14/1211:55LGW - SEA
1 stop13h 05mIcelandair
Tue 6/114:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 7/10£440
Sun 14/1211:55LGW - SEA
1 stop13h 05mIcelandair
Tue 6/114:35SEA - LGW
1 stop12h 20mIcelandair
Deal found 6/10£441
Sun 14/1212:15LHR - SEA
1 stop12h 45mIcelandair
Tue 6/114:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 7/10£443
Fri 21/1106:30STN - SEA
2 stops18h 30mMultiple Airlines
Fri 28/1114:35SEA - STN
2 stops22h 45mMultiple Airlines
Deal found 7/10£444
Fri 12/1212:15LHR - SEA
1 stop12h 45mIcelandair
Mon 9/315:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 6/10£444
Thu 20/1109:00LTN - SEA
2 stops16h 00mMultiple Airlines
Thu 27/1114:35SEA - LTN
2 stops17h 25mMultiple Airlines
Deal found 6/10£444
Wed 5/1112:15LHR - SEA
1 stop12h 45mIcelandair
Fri 3/415:45SEA - LHR
1 stop12h 10mIcelandair
Deal found 6/10£444
Sun 14/1212:15LHR - SEA
1 stop12h 45mIcelandair
Tue 30/1214:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 6/10£447
Thu 20/1108:50LGW - SEA
2 stops16h 10mMultiple Airlines
Thu 27/1114:35SEA - LGW
2 stops19h 55mMultiple Airlines
Deal found 6/10£447
Wed 17/1212:15LHR - SEA
1 stop12h 45mIcelandair
Tue 30/1214:35SEA - LHR
1 stop12h 15mIcelandair
Deal found 6/10£447
Thu 20/1108:50LGW - SEA
2 stops16h 10mMultiple Airlines
Thu 27/1114:35SEA - LGW
2 stops19h 55mMultiple Airlines
Deal found 6/10£449
Wed 5/1112:15LHR - SEA
1 stop12h 45mIcelandair
Fri 3/415:45SEA - LHR
1 stop12h 10mIcelandair
Deal found 5/10£449

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