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Cheap flights from Washington, D.C. to London Heathrow Airport from $217

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to London Heathrow Airport departing on 8/11. 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

KAYAK's recommended round-trip deals from the most popular airlines that fly from Washington, D.C. to London.
Scandinavian Airlines Logo
10:05 pm - 6:30 pmIAD-LHR
15h 25m1 stop
Scandinavian Airlines Logo
10:20 am - 7:59 pmLHR-IAD
14h 39m1 stop
$422Scandinavian Airlines
Find Deal
Mon, Aug 25 - Wed, Sep 3
Scandinavian Airlines Logo
10:05 pm - 5:40 pmIAD-LHR
14h 35m1 stop
Scandinavian Airlines Logo
7:30 pm - 7:59 pmLHR-IAD
29h 29m1 stop
$424Scandinavian Airlines
Find Deal
Wed, Sep 3 - Mon, Sep 15
Icelandair Logo
11:15 pm - 8:20 pmIAD-LHR
16h 05m1 stop
Icelandair Logo
1:05 pm - 10:10 pmLHR-IAD
14h 05m1 stop
$566Icelandair
Find Deal
Fri, Aug 15 - Sat, Aug 30
Icelandair Logo
11:15 pm - 8:20 pmIAD-LHR
16h 05m1 stop
Icelandair Logo
9:25 pm - 10:10 pmLHR-IAD
29h 45m1 stop
$567Icelandair
Find Deal
Fri, Oct 10 - Tue, Oct 21
United Airlines Logo
10:15 pm - 10:40 amIAD-LHR
7h 25mnonstop
United Airlines Logo
8:45 am - 4:15 pmLHR-IAD
12h 30m1 stop
$619United Airlines
Find Deal
Sun, May 11 - Tue, May 20
United Airlines Logo
7:02 pm - 10:00 amBWI-LHR
33h 58m2 stops
United Airlines Logo
7:25 am - 9:37 pmLHR-BWI
19h 12m2 stops
$628United Airlines
Find Deal
Sun, May 11 - Tue, May 20
Iberia Logo
5:50 pm - 6:15 amIAD-LHR
7h 25mnonstop
Iberia Logo
6:15 am - 3:00 pmLHR-IAD
13h 45m1 stop
$628Iberia
Find Deal
Wed, Sep 3 - Wed, Sep 24
British Airways Logo
9:20 pm - 9:35 amBWI-LHR
7h 15mnonstop
British Airways Logo
4:35 pm - 7:35 pmLHR-BWI
8h 00mnonstop
$645British Airways
Find Deal
Wed, Sep 24 - Thu, Oct 9
British Airways Logo
9:20 pm - 9:35 amBWI-LHR
7h 15mnonstop
British Airways Logo
4:35 pm - 7:35 pmLHR-BWI
8h 00mnonstop
$648British Airways
Find Deal
Wed, Sep 3 - Thu, Sep 11
Iberia Logo
9:20 pm - 9:35 amBWI-LHR
7h 15mnonstop
Iberia Logo
4:35 pm - 7:35 pmLHR-BWI
8h 00mnonstop
$656Iberia
Find Deal
Mon, May 12 - Tue, May 20

Air Canada flights from Washington, D.C. to London Heathrow Airport

Our best Air Canada deals on Washington, D.C. to London Heathrow Airport flight tickets
Air Canada
May 11
DCA9:40 amWashington, D.C. Reagan-National
15h 50m
1 stop
LHR6:30 amLondon Heathrow
May 20
LHR9:30 amLondon Heathrow
11h 19m
1 stop
DCA3:49 pmWashington, D.C. Reagan-National
Air Canada
May 11
DCA9:40 amWashington, D.C. Reagan-National
15h 50m
1 stop
LHR6:30 amLondon Heathrow
May 20
LHR9:30 amLondon Heathrow
11h 19m
1 stop
DCA3:49 pmWashington, D.C. Reagan-National
Air Canada
May 7
DCA12:55 pmWashington, D.C. Reagan-National
12h 35m
2 stops
LHR6:30 amLondon Heathrow
May 20
LHR6:50 amLondon Heathrow
13h 59m
2 stops
DCA3:49 pmWashington, D.C. Reagan-National

British Airways flights from Washington, D.C. to London Heathrow Airport

Our best British Airways deals on Washington, D.C. to London Heathrow Airport flight tickets
British Airways
Sep 24
BWI9:20 pmBaltimore/Washington
7h 15m
LHR9:35 amLondon Heathrow
Oct 9
LHR4:35 pmLondon Heathrow
8h 00m
BWI7:35 pmBaltimore/Washington
British Airways
Sep 3
BWI9:20 pmBaltimore/Washington
7h 15m
LHR9:35 amLondon Heathrow
Sep 11
LHR4:35 pmLondon Heathrow
8h 00m
BWI7:35 pmBaltimore/Washington
British Airways
Jul 22
BWI9:20 pmBaltimore/Washington
7h 15m
LHR9:35 amLondon Heathrow
Aug 27
LHR4:35 pmLondon Heathrow
8h 00m
BWI7:35 pmBaltimore/Washington

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 October is, on average, the cheapest month to fly to London Heathrow Airport from Washington, D.C., with most prices found around $667. If you’re not able to fly to London Heathrow Airport in October, then February is your next best option. Flight prices from Washington, D.C. to London Heathrow Airport during February average around $681.

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 $793. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $924.

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 $692. 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 $850.

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

Fly from Baltimore/Washington 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 14 weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $771 when searching 14 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 $725 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 April 2025, prices for Washington, D.C. to London Heathrow Airport flights are approximately 4% cheaper 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

$217

Fastest flight time

7h 15m

Direct flights

Every day
The best one-way flight to London Heathrow Airport from Washington, D.C. in the past 72 hours is $217. The best round-trip flight deal from Washington, D.C. to London Heathrow Airport found on momondo in the last 72 hours is $422.
The fastest flight from Washington, D.C. to London Heathrow Airport takes 7h 15m
Direct flights go from Washington, D.C. to London Heathrow Airport every day.

  • 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 15m 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
Scandinavian AirlinesPriceFrom $370Free CancellationRating
7.3
1,345 reviews
Search Scandinavian Airlines flights
PLAYPriceFrom $384Free CancellationRating
6.9
101 reviews
Search PLAY flights
DeltaPriceFrom $421Free CancellationRating
8.0
7,919 reviews
Search Delta flights
IcelandairPriceFrom $474Free CancellationRating
7.0
484 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $486Free CancellationRating
7.1
1,846 reviews
Search TAP AIR PORTUGAL flights
Aer LingusPriceFrom $529Free CancellationRating
7.0
1,068 reviews
Search Aer Lingus flights
Air CanadaPriceFrom $549Free CancellationRating
7.0
9,195 reviews
Search Air Canada flights
IberiaPriceFrom $562Free CancellationRating
7.0
2,686 reviews
Search Iberia flights
SWISSPriceFrom $572Free CancellationRating
7.5
1,582 reviews
Search SWISS flights
FinnairPriceFrom $573Free CancellationRating
7.6
1,272 reviews
Search Finnair 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 5 Delta flights for this route in a normal week, average airfare is usually $865 round-trip - but some users have found much cheaper deals with momondo.

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

    Across 1,272 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 $573 to $758. 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
Croydon
Luton
Guildford
Slough
Hayes
Dartford
Dover
Stansted
Ilford
Salisbury
Milton Keynes
Canterbury
Colchester
Horley
Wembley
Swindon
Chelmsford
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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