£212 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 11/1. 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, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

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Everything you should know

Cheapest return fare
£445
Typical prices: £473-£638
British Airways
Tue 10/2Tue 31/3
SEA - LHR • Direct
Cheapest direct flights
£447
Typical prices: £489-£677
Air France
Fri 16/1Wed 21/1
SEA - LHR • Direct
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Flight Deals
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Flight Deals

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

Tue, 10 Feb - Tue, 31 Mar
British Airways Logo
18:50 - 12:20SEA-LHR
9h 30mdirect
British Airways Logo
13:45 - 22:13LHR-SEA
16h 28m1 stop
£445British Airways
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Wed, 14 Jan - Sun, 18 Jan
Delta Logo
16:45 - 10:30SEA-LHR
9h 45mdirect
Delta Logo
08:40 - 11:50LHR-SEA
35h 10m1 stop
£446Delta
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Fri, 9 Jan - Fri, 16 Jan
Multiple Airlines Logo
05:50 - 07:10SEA-LHR
17h 20m2 stops
Multiple Airlines Logo
07:40 - 13:20LHR-SEA
13h 40m1 stop
£447Multiple Airlines
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Wed, 11 Feb - Fri, 20 Feb
Finnair Logo
17:45 - 11:20PDX-LHR
9h 35mdirect
Finnair Logo
13:45 - 15:55LHR-PDX
10h 10mdirect
£447Finnair
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Wed, 21 Jan - Tue, 27 Jan
Air Canada Logo
05:50 - 09:20SEA-LHR
19h 30m2 stops
Air Canada Logo
14:30 - 19:16LHR-SEA
12h 46m1 stop
£447Air Canada
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Sat, 17 Jan - Sun, 25 Jan
Multiple Airlines Logo
14:35 - 17:50SEA-LHR
19h 15m2 stops
Multiple Airlines Logo
06:00 - 17:00LHR-SEA
19h 00m2 stops
£448Multiple Airlines
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Mon, 16 Mar - Thu, 23 Apr
British Airways Logo
18:45 - 11:20PDX-LHR
9h 35mdirect
British Airways Logo
15:40 - 17:40LHR-PDX
10h 00mdirect
£449British Airways
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Mon, 20 Apr - Wed, 6 May
British Airways Logo
13:35 - 06:50SEA-LHR
9h 15mdirect
British Airways Logo
09:50 - 11:35LHR-SEA
9h 45mdirect
£449British Airways
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Tue, 30 Dec - Mon, 12 Jan
Delta Logo
00:55 - 07:05SEA-LHR
22h 10m1 stop
Delta Logo
17:35 - 11:25LHR-SEA
25h 50m1 stop
£450Delta
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Wed, 11 Feb - Fri, 20 Feb
Iberia Logo
06:00 - 06:50PDX-LHR
16h 50m1 stop
Iberia Logo
13:45 - 15:55LHR-PDX
10h 10mdirect
£451Iberia
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Useful Info

Good to know - Cheap tickets from Washington to London Heathrow Airport

Low seasonFebruary
Cheapest flight£212
Best time to beat the crowds (7% less expensive on average)
Most popular time to fly (13% more expensive on average)
Flight from Spokane 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
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Milton Keynes
Eastbourne
Hounslow
Luton
Southend-on-Sea
Northampton
Swindon
Slough
Croydon
Winchester
Stansted
Poole
Folkestone
Chichester
Maidstone
Salisbury
Colchester
Chelmsford
Crawley

Everything you need to know for your flight to Heathrow

Information on your arrival and departure airports

London Heathrow Airport (LHR)