£179 Find Cheap Flights from Washington to London – Compare and Save

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Cheap Flights from Washington to London

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Washington to London

Thu, 11 Feb - Sat, 20 Feb
Icelandair Logo
14:35 - 10:50SEA  Seattle/Tacoma Intl-LHR London Heathrow
12h 15m1 stop Reykjavik Keflavik Intl
Icelandair Logo
20:35 - 17:00LHR  London Heathrow-SEA Seattle/Tacoma Intl
28h 25m1 stop Reykjavik Keflavik Intl
£431Icelandair
Sun, 1 Nov - Fri, 6 Nov
Multiple Airlines Logo
14:35 - 15:05SEA  Seattle/Tacoma Intl-LTN London Luton
16h 30m1 stop Reykjavik Keflavik Intl
Multiple Airlines Logo
06:00 - 17:00LTN  London Luton-SEA Seattle/Tacoma Intl
19h 00m1 stop Reykjavik Keflavik Intl
£472Multiple Airlines
Fri, 9 Oct - Sun, 18 Oct
Multiple Airlines Logo
15:40 - 00:50SEA  Seattle/Tacoma Intl-STN London Stansted
25h 10m2 stops Reykjavik Keflavik Intl Oslo Gardermoen
Multiple Airlines Logo
05:55 - 20:40STN  London Stansted-SEA Seattle/Tacoma Intl
22h 45m2 stops Oslo Gardermoen Reykjavik Keflavik Intl
£474Multiple Airlines
Fri, 22 Jan - Wed, 27 Jan
British Airways Logo
18:45 - 12:10SEA  Seattle/Tacoma Intl-LHR London Heathrow
9h 25mdirect
British Airways Logo
14:55 - 16:50LHR  London Heathrow-SEA Seattle/Tacoma Intl
9h 55mdirect
£570British Airways
Wed, 24 Feb - Mon, 8 Mar
British Airways Logo
18:45 - 12:10SEA  Seattle/Tacoma Intl-LHR London Heathrow
9h 25mdirect
British Airways Logo
14:55 - 16:50LHR  London Heathrow-SEA Seattle/Tacoma Intl
9h 55mdirect
£570British Airways
Fri, 16 Oct - Thu, 12 Nov
British Airways Logo
20:20 - 13:45SEA  Seattle/Tacoma Intl-LHR London Heathrow
9h 25mdirect
British Airways Logo
09:25 - 11:25LHR  London Heathrow-SEA Seattle/Tacoma Intl
10h 00mdirect
£570British Airways
Sun, 1 Nov - Fri, 6 Nov
Virgin Atlantic Logo
16:50 - 10:40SEA  Seattle/Tacoma Intl-LHR London Heathrow
9h 50mdirect
Virgin Atlantic Logo
12:20 - 14:50LHR  London Heathrow-SEA Seattle/Tacoma Intl
10h 30mdirect
£572Virgin Atlantic
Tue, 10 Nov - Sun, 15 Nov
Virgin Atlantic Logo
16:50 - 10:40SEA  Seattle/Tacoma Intl-LHR London Heathrow
9h 50mdirect
Virgin Atlantic Logo
06:30 - 11:47LHR  London Heathrow-SEA Seattle/Tacoma Intl
13h 17m1 stop Amsterdam Schiphol
£572Virgin Atlantic
Thu, 3 Dec - Thu, 17 Dec
Alaska Airlines Logo
18:55 - 12:20SEA  Seattle/Tacoma Intl-LHR London Heathrow
9h 25mdirect
Alaska Airlines Logo
14:45 - 16:50LHR  London Heathrow-SEA Seattle/Tacoma Intl
10h 05mdirect
£577Alaska Airlines
Fri, 4 Dec - Wed, 16 Dec
Alaska Airlines Logo
18:55 - 12:20SEA  Seattle/Tacoma Intl-LHR London Heathrow
9h 25mdirect
Alaska Airlines Logo
14:45 - 16:50LHR  London Heathrow-SEA Seattle/Tacoma Intl
10h 05mdirect
£577Alaska Airlines
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Good to know - Cheap tickets from Washington to London

Low season

January

Cheapest flight

£179
Most popular time to fly and prices are also 16% lower on average.
Flight from Portland to London Stansted Airport

Flights from Washington to London: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Washington to London 
MichaelFlew with Delta-May 2026
We like Delta, Alaska and American. Be prepared for a bit of a trek from your arrival gate to Customs and outside services. Heathrow doesn't rank high on my list of major airports.
Verified travelerFlew with American Airlines-Apr 2026
Heathrow is too gigantic to have less than 2 hours of layover time.
Verified travelerFlew with British Airways-Apr 2025
Make sure you have plenty of time between flights if you are delayed.
Verified travelerFlew with British Airways-Feb 2025
Don’t take a flight if you sick, or if you have no choice prepare to stay covered with mask throughout the flight
Verified travelerFlew with British Airways-Apr 2024
Bring a sack lunch -- airport food was very expensive.

FAQs for booking flights from Washington to London

  • How does KAYAK find such low prices on flights from Washington to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Washington is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London with an airline and back to Washington with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Eastbourne
Milton Keynes
Hounslow
Luton
Southend-on-Sea
Newport
Folkestone
Winchester
Slough
Croydon
Stansted
Colchester
Chichester
Crawley
Maidstone
Chelmsford
Hastings
Bedford
Richmond

More options for your flight to London