£191 Find Cheap Flights from Washington to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Heathrow departing on 9/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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Cheap Flights from Washington to Heathrow

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Washington to Heathrow that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Washington to Heathrow

Thu, 2 Oct - Mon, 6 Oct
Icelandair Logo
19:00 - 11:55SEA-LHR
32h 55m1 stop
Icelandair Logo
21:25 - 20:40LHR-SEA
31h 15m1 stop
£373Icelandair
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Sat, 4 Oct - Thu, 6 Nov
Icelandair Logo
19:00 - 20:20SEA-LHR
17h 20m1 stop
Icelandair Logo
20:35 - 17:00LHR-SEA
28h 25m1 stop
£374Icelandair
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Tue, 23 Sep - Wed, 1 Oct
United Airlines Logo
07:15 - 09:35SEA-LHR
18h 20m1 stop
United Airlines Logo
06:55 - 16:59LHR-SEA
18h 04m1 stop
£374United Airlines
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Sun, 14 Sep - Tue, 30 Sep
Virgin Atlantic Logo
20:25 - 14:15SEA-LHR
9h 50mdirect
Virgin Atlantic Logo
13:25 - 15:30LHR-SEA
10h 05mdirect
£375Virgin Atlantic
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Sat, 20 Sep - Wed, 15 Oct
Air Canada Logo
19:15 - 11:50SEA-LHR
32h 35m2 stops
Air Canada Logo
08:40 - 18:36LHR-SEA
17h 56m2 stops
£377Air Canada
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Sun, 14 Sep - Tue, 30 Sep
Delta Logo
20:25 - 14:15SEA-LHR
9h 50mdirect
Delta Logo
06:15 - 11:15LHR-SEA
13h 00m1 stop
£379Delta
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Sun, 21 Sep - Tue, 30 Sep
Delta Logo
07:50 - 06:45SEA-LHR
14h 55m1 stop
Delta Logo
06:30 - 11:45LHR-SEA
13h 15m1 stop
£380Delta
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Sun, 21 Sep - Tue, 30 Sep
United Airlines Logo
07:15 - 06:30SEA-LHR
15h 15m1 stop
United Airlines Logo
16:25 - 16:59LHR-SEA
32h 34m1 stop
£382United Airlines
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Sat, 20 Sep - Tue, 30 Sep
Air Canada Logo
19:15 - 11:50SEA-LHR
32h 35m2 stops
Air Canada Logo
10:15 - 18:36LHR-SEA
16h 21m2 stops
£391Air Canada
Find Deal
Fri, 10 Oct - Fri, 17 Oct
Virgin Atlantic Logo
17:35 - 11:20SEA-LHR
9h 45mdirect
Virgin Atlantic Logo
18:00 - 20:25LHR-SEA
10h 25mdirect
£394Virgin Atlantic
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Good to know - Cheap tickets from Washington to London Heathrow Airport

Low seasonFebruary
Cheapest flight£191
Best time to beat the crowds (8% less expensive on average)
Most popular time to fly (10% more expensive on average)
Flight from Seattle to London Heathrow Airport

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

Insights shared by verified travellers who flew the route from Washington to Heathrow 
Learn how KAYAK collects reviews and tips from users.
Verified travelerFlew with British AirwaysSEA-LHRApr 2025
Make sure you have plenty of time between flights if you are delayed.
Verified travelerFlew with British AirwaysSEA-LHRApr 2024
Bring a sack lunch -- airport food was very expensive.

FAQs for booking Washington to London Heathrow Airport flights

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

    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 Heathrow Airport.

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

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

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

    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 Heathrow Airport 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 Heathrow Airport?

    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 Heathrow Airport 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 Heathrow?

Book flights to Heathrow if you plan to visit one of these locations
Gatwick
Milton Keynes
Eastbourne
Luton
Hounslow
Southend-on-Sea
Swindon
Northampton
Slough
Winchester
Croydon
Poole
Stansted
Folkestone
Chichester
Maidstone
Colchester
Salisbury
Chelmsford
Crawley

Everything you need to know for your flight to Heathrow

Information on your arrival and departure airports

London Heathrow Airport (LHR)

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