LHR

$334 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 7/26. 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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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 round-trip 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 round-trip flight deals from Washington to Heathrow

Sun, Apr 19 - Fri, Apr 24
Multiple Airlines Logo
7:00 pm - 9:20 pm
SEA
-
LHR
18h 20m
2 stops
Multiple Airlines Logo
6:40 am - 8:40 pm
LHR
-
SEA
22h 00m
2 stops
$648Multiple Airlines
Fri, Aug 21 - Sun, Aug 23
Scandinavian Airlines Logo
3:55 pm - 9:20 am
SEA
-
LHR
33h 25m
1 stop
Scandinavian Airlines Logo
9:05 pm - 1:45 pm
LHR
-
SEA
48h 40m
2 stops
$651Scandinavian Airlines
Fri, Aug 21 - Mon, Aug 24
Scandinavian Airlines Logo
3:55 pm - 2:35 pm
SEA
-
LHR
38h 40m
2 stops
Scandinavian Airlines Logo
6:40 am - 1:45 pm
LHR
-
SEA
39h 05m
2 stops
$655Scandinavian Airlines
Mon, Sep 28 - Mon, Oct 5
Icelandair Logo
3:30 pm - 8:20 pm
PDX
-
LHR
20h 50m
1 stop
Icelandair Logo
9:25 pm - 5:55 pm
LHR
-
PDX
28h 30m
1 stop
$755Icelandair
Mon, Apr 20 - Thu, Apr 30
Icelandair Logo
3:30 pm - 11:55 am
PDX
-
LHR
12h 25m
1 stop
Icelandair Logo
9:25 pm - 6:00 pm
LHR
-
PDX
28h 35m
1 stop
$756Icelandair
Wed, Sep 9 - Wed, Oct 7
Iberia Logo
12:45 pm - 12:50 pm
GEG
-
LHR
16h 05m
1 stop
Iberia Logo
6:15 am - 8:47 pm
LHR
-
GEG
22h 32m
2 stops
$869Iberia
Wed, Aug 12 - Tue, Sep 15
Iberia Logo
12:45 pm - 12:10 pm
GEG
-
LHR
15h 25m
1 stop
Iberia Logo
6:15 am - 8:47 pm
LHR
-
GEG
22h 32m
2 stops
$870Iberia
Sun, Sep 27 - Wed, Oct 7
Delta Logo
3:05 pm - 12:10 pm
GEG
-
LHR
13h 05m
1 stop
Delta Logo
6:30 am - 4:06 pm
LHR
-
GEG
17h 36m
2 stops
$874Delta
Wed, Sep 9 - Wed, Oct 7
Delta Logo
6:30 am - 10:15 am
GEG
-
LHR
19h 45m
1 stop
Delta Logo
6:30 am - 4:06 pm
LHR
-
GEG
17h 36m
2 stops
$875Delta
Sat, Sep 12 - Fri, Sep 25
Virgin Atlantic Logo
12:35 pm - 12:10 pm
PSC
-
LHR
39h 35m
1 stop
Virgin Atlantic Logo
12:25 pm - 7:44 pm
LHR
-
PSC
15h 19m
1 stop
$902Virgin Atlantic
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$334
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 16% increase in price.
Flight from Spokane to London Heathrow Airport

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

Insights shared by verified travelers who flew the route from Washington to Heathrow 
Learn how KAYAK collects reviews and tips from users.
Verified travelerFlew with British Airways
SEA
-
LHR
Apr 2025
Make sure you have plenty of time between flights if you are delayed.
Verified travelerFlew with British Airways
SEA
-
LHR
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
SEA
-
LHR
Apr 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 travelers 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 round-trip 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.

Traveling to a place near Heathrow?

Book flights to Heathrow if you plan to visit one of these locations
Hounslow
Slough
Hayes
Wembley
Richmond
Luton
Salisbury
Crawley
Watford
Ilford
Eastbourne
Guildford
Bedford
Colchester
St. Albans
Ipswich
Kingston upon Thames
Twickenham
Northampton
Swindon

Everything you need to know for your flight to Heathrow

Information on your arrival and departure airports

London Heathrow Airport (LHR)