£210 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 5/12. 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

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

Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 26% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest return fare
£401
Overall average: £544
Icelandair
Sat 11/4Sat 18/4
SEA - LHR • 1 stop
Cheapest direct flights
£404
Typical prices: £619-£1,139
Virgin Atlantic
Thu 4/12Tue 9/12
SEA - LHR • Direct
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Heathrow!
Flight Deals
Useful Info
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

Sat, 11 Apr - Sat, 18 Apr
Icelandair Logo
19:00 - 11:55SEA-LHR
32h 55m1 stop
Icelandair Logo
21:25 - 17:50LHR-SEA
28h 25m1 stop
£401Icelandair
Find Deal
Sat, 7 Feb - Thu, 19 Feb
Icelandair Logo
14:35 - 10:50SEA-LHR
12h 15m1 stop
Icelandair Logo
12:15 - 17:00LHR-SEA
12h 45m1 stop
£402Icelandair
Find Deal
Sat, 25 Apr - Sat, 16 May
Icelandair Logo
19:00 - 20:20SEA-LHR
17h 20m1 stop
Icelandair Logo
21:25 - 20:45LHR-SEA
31h 20m1 stop
£403Icelandair
Find Deal
Thu, 4 Dec - Tue, 9 Dec
Scandinavian Airlines Logo
12:45 - 17:40SEA-LHR
20h 55m2 stops
Scandinavian Airlines Logo
06:40 - 22:23LHR-SEA
23h 43m2 stops
£417Scandinavian Airlines
Find Deal
Mon, 1 Dec - Mon, 8 Dec
Multiple Airlines Logo
14:45 - 21:20PDX-LHR
22h 35m2 stops
Multiple Airlines Logo
06:40 - 17:00LHR-PDX
18h 20m2 stops
£420Multiple Airlines
Find Deal
Mon, 24 Nov - Wed, 26 Nov
Aer Lingus Logo
20:05 - 16:50SEA-LHR
12h 45m1 stop
Aer Lingus Logo
08:50 - 18:20LHR-SEA
17h 30m1 stop
£422Aer Lingus
Find Deal
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
£432Virgin Atlantic
Find Deal
Tue, 2 Dec - Tue, 9 Dec
Multiple Airlines Logo
14:35 - 17:00SEA-LHR
18h 25m2 stops
Multiple Airlines Logo
06:40 - 17:00LHR-SEA
18h 20m2 stops
£432Multiple Airlines
Find Deal
Tue, 28 Apr - Tue, 25 Aug
Scandinavian Airlines Logo
10:55 - 16:00SEA-LHR
21h 05m2 stops
Scandinavian Airlines Logo
06:40 - 13:45LHR-SEA
15h 05m1 stop
£434Scandinavian Airlines
Find Deal
Wed, 3 Dec - Wed, 10 Dec
Virgin Atlantic Logo
13:45 - 10:00PDX-LHR
12h 15m1 stop
Virgin Atlantic Logo
06:30 - 11:25LHR-PDX
12h 55m1 stop
£444Virgin Atlantic
Find Deal
Useful Info

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

Low seasonFebruary
Cheapest flight£215
Best time to beat the crowds (9% 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)