LHR

$263 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 4/20. 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

Mon, Apr 20 - Mon, Apr 27
Multiple Airlines Logo
3:40 pm - 8:55 pm
SEA
-
LHR
21h 15m
3 stops
Multiple Airlines Logo
6:40 am - 8:40 pm
LHR
-
SEA
22h 00m
2 stops
$611Multiple Airlines
Sun, Apr 19 - Tue, May 5
Multiple Airlines Logo
7:00 pm - 9:35 pm
SEA
-
LHR
18h 35m
3 stops
Multiple Airlines Logo
6:40 am - 8:40 pm
LHR
-
SEA
22h 00m
2 stops
$612Multiple Airlines
Sun, Apr 19 - Tue, May 5
Multiple Airlines Logo
7:00 pm - 9:35 pm
SEA
-
LHR
18h 35m
3 stops
Multiple Airlines Logo
6:40 am - 8:40 pm
LHR
-
SEA
22h 00m
2 stops
$613Multiple Airlines
Tue, Aug 25 - Fri, Aug 28
Scandinavian Airlines Logo
3:55 pm - 12:55 pm
SEA
-
LHR
37h 00m
2 stops
Scandinavian Airlines Logo
10:20 am - 1:45 pm
LHR
-
SEA
35h 25m
1 stop
$622Scandinavian Airlines
Mon, Apr 27 - Tue, May 12
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
$699Icelandair
Mon, Apr 13 - Tue, Apr 28
Icelandair Logo
3:30 pm - 8:20 pm
PDX
-
LHR
20h 50m
1 stop
Icelandair Logo
9:25 pm - 6:00 pm
LHR
-
PDX
28h 35m
1 stop
$701Icelandair
Tue, Sep 15 - Sat, Sep 26
Scandinavian Airlines Logo
1:00 pm - 4:00 pm
GEG
-
LHR
19h 00m
2 stops
Scandinavian Airlines Logo
5:00 pm - 5:08 pm
LHR
-
GEG
32h 08m
2 stops
$845Scandinavian Airlines
Wed, Aug 12 - Tue, Sep 15
American Airlines Logo
12:45 pm - 12:10 pm
GEG
-
LHR
15h 25m
1 stop
American Airlines Logo
8:55 am - 8:47 pm
LHR
-
GEG
19h 52m
1 stop
$853American Airlines
Wed, Aug 12 - Tue, Sep 15
American Airlines Logo
12:45 pm - 12:10 pm
GEG
-
LHR
15h 25m
1 stop
American Airlines Logo
8:55 am - 8:47 pm
LHR
-
GEG
19h 52m
1 stop
$854American Airlines
Mon, Aug 3 - Thu, Aug 20
Alaska Airlines Logo
3:22 pm - 3:05 pm
ALW
-
LHR
15h 43m
1 stop
Alaska Airlines Logo
5:00 pm - 12:12 am
LHR
-
ALW
15h 12m
1 stop
$1,206Alaska Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$263
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 15% increase in price.
Flight from Portland 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
Wembley
Hayes
Richmond
Luton
Salisbury
Crawley
Watford
Ilford
Eastbourne
Guildford
Bedford
Colchester
St. Albans
Swindon
Kingston upon Thames
Twickenham
Ipswich
Northampton

Everything you need to know for your flight to Heathrow

Information on your arrival and departure airports

London Heathrow Airport (LHR)