£220 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 4/12. 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

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Everything you should know

Cheapest return fare
£422
Typical prices: £491-£632
Icelandair
Sun 5/4Thu 23/4
SEA - LHR • 1 stop
Cheapest direct flights
£436
Typical prices: £484-£676
Finnair
Mon 12/1Tue 3/2
SEA - LHR • Direct
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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

Sun, 5 Apr - Thu, 23 Apr
Icelandair Logo
15:45 - 11:55SEA-LHR
12h 10m1 stop
Icelandair Logo
13:05 - 17:50LHR-SEA
12h 45m1 stop
£422Icelandair
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Sun, 22 Mar - Mon, 13 Apr
Icelandair Logo
15:35 - 19:30SEA-LHR
20h 55m1 stop
Icelandair Logo
21:25 - 20:45LHR-SEA
31h 20m1 stop
£424Icelandair
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Sat, 4 Apr - Sat, 11 Apr
Icelandair Logo
19:00 - 11:55SEA-LHR
32h 55m1 stop
Icelandair Logo
21:25 - 20:45LHR-SEA
31h 20m1 stop
£425Icelandair
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Wed, 14 Jan - Thu, 29 Jan
Virgin Atlantic Logo
06:00 - 07:05PDX-LHR
17h 05m1 stop
Virgin Atlantic Logo
11:05 - 17:35LHR-PDX
14h 30m1 stop
£431Virgin Atlantic
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Sun, 30 Nov - Tue, 9 Dec
Lufthansa Logo
15:40 - 11:50SEA-LHR
12h 10m1 stop
Lufthansa Logo
20:15 - 13:20LHR-SEA
25h 05m1 stop
£432Lufthansa
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Tue, 27 Jan - Wed, 4 Feb
Iberia Logo
06:00 - 10:00PDX-LHR
20h 00m1 stop
Iberia Logo
18:45 - 11:45LHR-PDX
25h 00m2 stops
£438Iberia
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Mon, 9 Feb - Wed, 18 Feb
Finnair Logo
17:45 - 11:20PDX-LHR
9h 35mdirect
Finnair Logo
13:45 - 15:55LHR-PDX
10h 10mdirect
£439Finnair
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Tue, 10 Feb - Wed, 25 Feb
Virgin Atlantic Logo
06:00 - 07:05PDX-LHR
17h 05m1 stop
Virgin Atlantic Logo
06:30 - 11:25LHR-PDX
12h 55m1 stop
£442Virgin Atlantic
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Mon, 9 Feb - Wed, 18 Feb
Finnair Logo
07:38 - 06:50PDX-LHR
15h 12m1 stop
Finnair Logo
13:45 - 15:55LHR-PDX
10h 10mdirect
£443Finnair
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Fri, 20 Feb - Sat, 28 Feb
Lufthansa Logo
07:00 - 07:25GEG-LHR
16h 25m1 stop
Lufthansa Logo
07:40 - 21:07LHR-GEG
21h 27m2 stops
£465Lufthansa
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Useful Info

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

Low seasonFebruary
Cheapest flight£220
Best time to beat the crowds (7% less expensive on average)
Most popular time to fly (13% more expensive on average)
Flight from Portland 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
Northampton
Swindon
Slough
Winchester
Croydon
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)