LHR

$257 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

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

Travelers love KAYAK
41.299.237 searches in the past 7 days on KAYAK

Save 23% 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.

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 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

mar., avr. 14 - jeu., avr. 23
Icelandair Logo
3:40 pm - 8:20 pm
SEA
-
LHR
20h 40m
1 stop
Icelandair Logo
1:05 pm - 5:55 pm
LHR
-
SEA
12h 50m
1 stop
$542Icelandair
dim., avr. 19 - mar., avr. 28
Icelandair Logo
3:40 pm - 8:20 pm
SEA
-
LHR
20h 40m
1 stop
Icelandair Logo
1:05 pm - 5:55 pm
LHR
-
SEA
12h 50m
1 stop
$543Icelandair
ven., mai 22 - lun., mai 25
Scandinavian Airlines Logo
3:55 pm - 9:35 pm
SEA
-
LHR
45h 40m
2 stops
Scandinavian Airlines Logo
9:05 pm - 1:45 pm
LHR
-
SEA
24h 40m
2 stops
$544Scandinavian Airlines
mer., avr. 22 - jeu., avr. 30
Icelandair Logo
3:40 pm - 11:55 am
SEA
-
LHR
12h 15m
1 stop
Icelandair Logo
1:05 pm - 5:55 pm
LHR
-
SEA
12h 50m
1 stop
$545Icelandair
jeu., avr. 16 - lun., avr. 20
Multiple Airlines Logo
3:30 pm - 9:40 pm
PDX
-
LHR
22h 10m
3 stops
Multiple Airlines Logo
6:40 am - 6:00 pm
LHR
-
PDX
19h 20m
2 stops
$600Multiple Airlines
lun., avr. 13 - jeu., avr. 30
Lufthansa Logo
12:35 pm - 10:40 pm
GEG
-
LHR
26h 05m
2 stops
Lufthansa Logo
6:55 am - 9:16 pm
LHR
-
GEG
22h 21m
2 stops
$626Lufthansa
mer., mai 6 - mer., mai 20
Multiple Airlines Logo
6:00 am - 10:00 am
GEG
-
LHR
20h 00m
2 stops
Multiple Airlines Logo
6:55 am - 9:16 pm
LHR
-
GEG
22h 21m
2 stops
$643Multiple Airlines
lun., avr. 13 - jeu., avr. 30
United Airlines Logo
4:01 pm - 12:20 pm
GEG
-
LHR
12h 19m
1 stop
United Airlines Logo
7:25 am - 9:40 pm
LHR
-
GEG
22h 15m
2 stops
$649United Airlines
jeu., mars 19 - jeu., mars 26
United Airlines Logo
5:00 am - 7:10 am
GEG
-
LHR
19h 10m
2 stops
United Airlines Logo
10:05 am - 9:03 pm
LHR
-
GEG
17h 58m
1 stop
$665United Airlines
mer., avr. 8 - lun., avr. 27
Scandinavian Airlines Logo
12:13 pm - 10:00 am
PSC
-
LHR
13h 47m
1 stop
Scandinavian Airlines Logo
7:45 pm - 5:09 pm
LHR
-
PSC
29h 24m
2 stops
$669Scandinavian Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$257
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 17% 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
Ilford
Crawley
Watford
Guildford
Eastbourne
Kingston upon Thames
Colchester
St. Albans
Swindon
Northampton
Ipswich
Bedford
Twickenham

Everything you need to know for your flight to Heathrow

Information on your arrival and departure airports

London Heathrow Airport (LHR)