Cheap flights from Washington, D.C. to London from $73

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to London departing on 7/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. to London

Cheap round-trip flights

JetBlue Logo
3:45 pm - 6:30 amDCA-LHR
9h 45m1 stop
JetBlue Logo
8:25 am - 8:03 amLHR-DCA
28h 38m1 stop
$73JetBlue
Find Deal
Thu, Jul 31 - Mon, Aug 11
JetBlue Logo
6:15 pm - 6:30 amDCA-LHR
31h 15m1 stop
JetBlue Logo
8:25 am - 8:03 pmLHR-DCA
16h 38m1 stop
$75JetBlue
Find Deal
Sat, Aug 9 - Fri, Aug 15
United Airlines Logo
7:00 pm - 11:45 amDCA-LHR
11h 45m1 stop
United Airlines Logo
8:00 am - 2:22 pmLHR-DCA
11h 22m1 stop
$486United Airlines
Find Deal
Sun, Aug 10 - Tue, Aug 19
British Airways Logo
7:25 pm - 7:45 amIAD-LHR
7h 20mnonstop
British Airways Logo
6:10 am - 3:00 pmLHR-IAD
13h 50m1 stop
$490British Airways
Find Deal
Tue, Sep 23 - Tue, Oct 7
British Airways Logo
5:50 pm - 6:15 amIAD-LHR
7h 25mnonstop
British Airways Logo
6:10 am - 3:00 pmLHR-IAD
13h 50m1 stop
$491British Airways
Find Deal
Tue, Sep 23 - Tue, Oct 14
United Airlines Logo
6:15 am - 7:10 amBWI-LHR
19h 55m2 stops
United Airlines Logo
1:25 pm - 5:14 pmLHR-BWI
32h 49m2 stops
$507United Airlines
Find Deal
Wed, Nov 19 - Wed, Nov 26
Iberia Logo
5:30 pm - 7:50 amDCA-LHR
9h 20m1 stop
Iberia Logo
8:00 pm - 11:07 pmLHR-DCA
32h 07m2 stops
$510Iberia
Find Deal
Wed, Aug 27 - Thu, Sep 11
Iberia Logo
3:35 pm - 6:20 amDCA-LHR
9h 45m1 stop
Iberia Logo
8:55 am - 7:00 pmLHR-DCA
15h 05m1 stop
$521Iberia
Find Deal
Tue, Sep 9 - Thu, Sep 25
Icelandair Logo
8:30 pm - 10:50 amBWI-LHR
10h 20m1 stop
Icelandair Logo
12:15 pm - 6:30 pmLHR-BWI
11h 15m1 stop
$547Icelandair
Find Deal
Thu, Oct 30 - Sun, Nov 9
Icelandair Logo
7:30 pm - 10:50 amBWI-LHR
10h 20m1 stop
Icelandair Logo
12:15 pm - 6:30 pmLHR-BWI
11h 15m1 stop
$579Icelandair
Find Deal
Tue, Dec 2 - Sun, Dec 7

JetBlue flights from Washington, D.C. to London Heathrow Airport

Our best JetBlue deals on Washington, D.C. to London Heathrow Airport flight tickets
JetBlue
Jul 31
DCA3:45 pmWashington, D.C. Reagan-National
9h 45m
1 stop
LHR6:30 amLondon Heathrow
Aug 11
LHR8:25 amLondon Heathrow
28h 38m
1 stop
DCA8:03 amWashington, D.C. Reagan-National
JetBlue
Aug 9
DCA6:15 pmWashington, D.C. Reagan-National
31h 15m
1 stop
LHR6:30 amLondon Heathrow
Aug 15
LHR8:25 amLondon Heathrow
16h 38m
1 stop
DCA8:03 pmWashington, D.C. Reagan-National
JetBlue
Aug 5
DCA6:30 amWashington, D.C. Reagan-National
9h 15m
1 stop
LHR8:45 pmLondon Heathrow
Aug 9
LHR8:15 amLondon Heathrow
19h 43m
1 stop
DCA10:58 pmWashington, D.C. Reagan-National

United Airlines flights from Washington, D.C. to London Heathrow Airport

Our best United Airlines deals on Washington, D.C. to London Heathrow Airport flight tickets
United Airlines
Aug 10
DCA7:00 pmWashington, D.C. Reagan-National
11h 45m
1 stop
LHR11:45 amLondon Heathrow
Aug 19
LHR8:00 amLondon Heathrow
11h 22m
1 stop
DCA2:22 pmWashington, D.C. Reagan-National
United Airlines
Nov 19
BWI6:15 amBaltimore/Washington
19h 55m
2 stops
LHR7:10 amLondon Heathrow
Nov 26
LHR1:25 pmLondon Heathrow
32h 49m
2 stops
BWI5:14 pmBaltimore/Washington
United Airlines
Jul 30
DCA12:55 pmWashington, D.C. Reagan-National
14h 40m
1 stop
LHR8:35 amLondon Heathrow
Aug 8
LHR8:30 amLondon Heathrow
15h 32m
1 stop
DCA7:02 pmWashington, D.C. Reagan-National

See travel insights to London from

How to get the cheapest flight ticket from Washington, D.C. to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Washington, D.C. and London Heathrow Airport?

What is the cheapest month to fly to London Heathrow Airport?

The month of February is, on average, the cheapest month to fly to London Heathrow Airport from Washington, D.C., with most prices found around $682. If you’re not able to fly to London Heathrow Airport in February, then January is your next best option. Flight prices from Washington, D.C. to London Heathrow Airport during January average around $687.

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $760. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $898.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Washington, D.C. to London Heathrow Airport in the morning for as low as $748. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $830.

What is the cheapest Washington, D.C. to London Heathrow flight route?

Fly from Washington, D.C. Dulles Intl to London Heathrow for the best Washington, D.C. - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $760 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Washington, D.C. for as low as $691 on momondo.

What cabin class options are available on Washington, D.C. to London Heathrow flights?

There are 4 cabin classes available to choose from on Washington, D.C. to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Washington, D.C. to London Heathrow Airport flight prices changed over time?

As of July 2025, prices for Washington, D.C. to London Heathrow Airport flights are approximately 24% more expensive when compared to flights at the same time last year.

When to book flights from Washington, D.C. to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. to London Heathrow Airport (WAS to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to London Heathrow Airport

Best Price Found

$86

Fastest flight time

7h 20m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sat
The best one-way flight to London Heathrow Airport from Washington, D.C. in the past 72 hours is $86. The best round-trip flight deal from Washington, D.C. to London Heathrow Airport found on momondo in the last 72 hours is $73.
The fastest flight from Washington, D.C. to London Heathrow Airport takes 7h 20m
Direct flights go from Washington, D.C. to London Heathrow Airport on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. Airlines offering direct flights are: United Airlines, Finnair and Aer Lingus.

  • How far is Washington, D.C. to London Heathrow by plane?

    Washington, D.C. and London Heathrow are 3649.4 mi apart from one another. 7h 20m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Washington, D.C. to London Heathrow Airport?

    Prices for flights from Washington, D.C. to London Heathrow Airport were last updated today.

  • How many operators does momondo search for flights from Washington, D.C. to London Heathrow Airport?

  • How old do you have to be to fly from Washington, D.C. to London Heathrow Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Washington, D.C. to London Heathrow Airport?

  • What is the most popular airline from Washington, D.C. to London Heathrow Airport?


Best airlines flying from Washington, D.C. to London Heathrow Airport

Compare and see reviews for airlines that fly from Washington, D.C. to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
PLAYPriceFrom $379Free CancellationRating
7.0
102 reviews
Search PLAY flights
Scandinavian AirlinesPriceFrom $409Free CancellationRating
7.3
1,424 reviews
Search Scandinavian Airlines flights
DeltaPriceFrom $421Free CancellationRating
8.0
7,958 reviews
Search Delta flights
IcelandairPriceFrom $433Free CancellationRating
7.0
518 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $486Free CancellationRating
7.1
1,922 reviews
Search TAP AIR PORTUGAL flights
Air CanadaPriceFrom $549Free CancellationRating
7.1
9,743 reviews
Search Air Canada flights
Aer LingusPriceFrom $557Free CancellationRating
7.1
1,168 reviews
Search Aer Lingus flights
Virgin AtlanticPriceFrom $562Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
IberiaPriceFrom $562Free CancellationRating
7.0
2,842 reviews
Search Iberia flights
SWISSPriceFrom $572Free CancellationRating
7.5
1,661 reviews
Search SWISS flights
  • Delta Flights From Washington, D.C. to London Heathrow Airport

    Delta flight deals from Washington, D.C. to London Heathrow Airport start from $421 round-trip. Over the 4 Delta flights for this route in a normal week, average airfare is usually $802 round-trip - but some users have found much cheaper deals with momondo.

  • Finnair Flights From Washington, D.C. to London Heathrow Airport

    Across 1,316 Finnair reviews on momondo, the average score is 7.6/10. Finnair flies from Washington, D.C. to London Heathrow Airport about 13 times each week, with ticket deals ranging from $585 to $753. Price data is based on momondo searches in the last 72 hours.


Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Slough
Dover
Luton
Croydon
Dartford
Guildford
Stansted
Milton Keynes
Hayes
Salisbury
Ilford
Swindon
Colchester
Stratford-upon-Avon
Chelmsford
Canterbury
Watford
Richmond

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to London?

Finding the right flight to London from Washington, D.C. is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

Can I find flights from Washington, D.C. to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington, D.C. to London flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington, D.C. to London?

momondo provides multiple filters to help you find the best flight to London from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Washington, D.C. to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.


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1 adult
Tue 7/22
Tue 7/29

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