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Cheap flights from London Heathrow Airport to Washington, D.C. from $381

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Washington, D.C. departing on 1/18. 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 London Heathrow Airport to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
7:55 pm - 9:00 pmLHR-IAD
30h 05m1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 5:30 pmIAD-LHR
14h 00m1 stop
$537TAP AIR PORTUGAL
Find Deal
Thu, Feb 12 - Sun, Feb 22
TAP AIR PORTUGAL Logo
6:00 am - 3:15 pmLHR-IAD
14h 15m1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 10:40 pmIAD-LHR
19h 10m1 stop
$540TAP AIR PORTUGAL
Find Deal
Sat, Jan 31 - Fri, Feb 6
JetBlue Logo
8:05 am - 2:59 pmLHR-DCA
11h 54m1 stop
JetBlue Logo
6:15 am - 8:45 pmDCA-LHR
9h 30m1 stop
$552JetBlue
Find Deal
Mon, Nov 24 - Mon, Dec 1
Icelandair Logo
9:20 am - 5:35 pmLHR-DCA
13h 15m1 stop
Icelandair Logo
6:15 am - 8:45 pmDCA-LHR
9h 30m1 stop
$557Icelandair
Find Deal
Mon, Feb 2 - Mon, Feb 9
Icelandair Logo
9:20 am - 5:35 pmLHR-DCA
13h 15m1 stop
Icelandair Logo
1:00 pm - 6:55 amDCA-LHR
12h 55m1 stop
$558Icelandair
Find Deal
Mon, Feb 2 - Mon, Feb 9
JetBlue Logo
12:20 pm - 10:59 pmLHR-DCA
15h 39m1 stop
JetBlue Logo
3:40 pm - 6:55 amDCA-LHR
10h 15m1 stop
$577JetBlue
Find Deal
Tue, Nov 25 - Tue, Dec 2
Virgin Atlantic Logo
12:30 pm - 10:08 pmLHR-BWI
14h 38m1 stop
Virgin Atlantic Logo
6:21 pm - 11:40 amBWI-LHR
12h 19m1 stop
$609Virgin Atlantic
Find Deal
Fri, Dec 5 - Tue, Dec 9
Virgin Atlantic Logo
1:00 pm - 11:03 pmLHR-BWI
15h 03m1 stop
Virgin Atlantic Logo
4:49 pm - 9:00 amBWI-LHR
11h 11m1 stop
$611Virgin Atlantic
Find Deal
Wed, Dec 10 - Wed, Dec 17
Delta Logo
11:45 am - 10:59 pmLHR-BWI
15h 14m2 stops
Delta Logo
11:00 am - 6:20 amBWI-LHR
15h 20m2 stops
$651Delta
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Fri, Mar 13 - Sun, Mar 15
Delta Logo
10:45 am - 12:43 amLHR-BWI
18h 58m1 stop
Delta Logo
6:00 am - 7:50 amBWI-LHR
20h 50m1 stop
$659Delta
Find Deal
Tue, Dec 23 - Fri, Jan 2

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

Our best Scandinavian Airlines deals on London Heathrow Airport to Washington, D.C. flight tickets
Scandinavian Airlines
Mar 12
LHR10:20 amLondon Heathrow
11h 55m
1 stop
IAD6:15 pmWashington, D.C. Dulles Intl
Mar 16
IAD9:30 pmWashington, D.C. Dulles Intl
14h 55m
2 stops
LHR4:25 pmLondon Heathrow
$578
Find similar
Scandinavian Airlines
Feb 2
LHR6:40 amLondon Heathrow
15h 35m
1 stop
IAD5:15 pmWashington, D.C. Dulles Intl
Feb 9
IAD8:30 pmWashington, D.C. Dulles Intl
31h 50m
1 stop
LHR9:20 amLondon Heathrow
$579
Find similar
Scandinavian Airlines
Jan 29
LHR10:20 amLondon Heathrow
11h 55m
1 stop
IAD5:15 pmWashington, D.C. Dulles Intl
Feb 2
IAD8:30 pmWashington, D.C. Dulles Intl
14h 30m
1 stop
LHR4:00 pmLondon Heathrow
$580
Find similar

Virgin Atlantic flights from London Heathrow Airport to Washington, D.C.

Our best Virgin Atlantic deals on London Heathrow Airport to Washington, D.C. flight tickets
Virgin Atlantic
Dec 5
LHR12:30 pmLondon Heathrow
14h 38m
1 stop
BWI10:08 pmBaltimore/Washington
Dec 9
BWI6:21 pmBaltimore/Washington
12h 19m
1 stop
LHR11:40 amLondon Heathrow
$609
Find similar
Virgin Atlantic
Dec 10
LHR1:00 pmLondon Heathrow
15h 03m
1 stop
BWI11:03 pmBaltimore/Washington
Dec 17
BWI4:49 pmBaltimore/Washington
11h 11m
1 stop
LHR9:00 amLondon Heathrow
$611
Find similar
Virgin Atlantic
Dec 9
LHR10:00 amLondon Heathrow
11h 05m
1 stop
IAD4:05 pmWashington, D.C. Dulles Intl
Jan 10
IAD10:20 pmWashington, D.C. Dulles Intl
7h 30m
LHR10:50 amLondon Heathrow
$614
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from London Heathrow Airport to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 27, 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 2/12

7:55 pm-9:00 pm

1 stop30h 05m

Washington, D.C. Dulles Intl

Sun 2/22

10:30 pm-5:30 pm

1 stop14h 00m

$537

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 1/31

6:00 am-3:15 pm

1 stop14h 15m

Washington, D.C. Dulles Intl

Fri 2/6

10:30 pm-10:40 pm

1 stop19h 10m

$540

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Mon 11/24

8:05 am-2:59 pm

1 stop11h 54m

Washington, D.C. Reagan-National

Mon 12/1

6:15 am-8:45 pm

1 stop9h 30m

$552

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Mon 2/2

9:20 am-5:35 pm

1 stop13h 15m

Washington, D.C. Reagan-National

Mon 2/9

6:15 am-8:45 pm

1 stop9h 30m

$557

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Mon 2/2

9:20 am-5:35 pm

1 stop13h 15m

Washington, D.C. Reagan-National

Mon 2/9

1:00 pm-6:55 am

1 stop12h 55m

$558

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Tue 11/25

12:20 pm-10:59 pm

1 stop15h 39m

Washington, D.C. Reagan-National

Tue 12/2

3:40 pm-6:55 am

1 stop10h 15m

$577

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Fri 12/5

12:30 pm-10:08 pm

1 stop14h 38m

Baltimore/Washington

Tue 12/9

6:21 pm-11:40 am

1 stop12h 19m

$609

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Wed 12/10

1:00 pm-11:03 pm

1 stop15h 03m

Baltimore/Washington

Wed 12/17

4:49 pm-9:00 am

1 stop11h 11m

$611

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Fri 3/13

11:45 am-10:59 pm

2 stops15h 14m

Baltimore/Washington

Sun 3/15

11:00 am-6:20 am

2 stops15h 20m

$651

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Tue 12/23

10:45 am-12:43 am

1 stop18h 58m

Baltimore/Washington

Fri 1/2

6:00 am-7:50 am

1 stop20h 50m

$659

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

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

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 London Heathrow Airport and Washington, D.C.?

What is the cheapest month to fly to Washington, D.C.?

The month of September is, on average, the cheapest month to fly to Washington, D.C. from London Heathrow Airport, with most prices found around $648. If you’re not able to fly to Washington, D.C. in September, then February is your next best option. Flight prices from London Heathrow Airport to Washington, D.C. during February average around $698.

What is the cheapest day to depart on your flight to Washington, D.C.?

On average, the least expensive day to fly to Washington, D.C. from London Heathrow Airport is on a Thursday. momondo users have found tickets for Thursday departures for as low as $790. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Washington, D.C. for around $931.

What is the cheapest time of day to depart on your flight to Washington, D.C.?

In the evening is the cheapest time of day to fly from London Heathrow Airport to Washington, D.C. when you can find flight prices for as low as $762. Flying to Washington, D.C. in the evening is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around $870. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

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

How far in advance should I book a flight to Washington, D.C.?

You are more likely to see cheaper flights to Washington, D.C. from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $782 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from London Heathrow Airport for as low as $737 on momondo.

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

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

Can stopping save me money on London Heathrow Airport to Washington, D.C. flights?

No. A direct flight is the cheapest option for a flight between London Heathrow Airport to Washington, D.C..

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

As of October 2025, prices for London Heathrow Airport to Washington, D.C. flights are approximately 4% more expensive when compared to flights at the same time last year.

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

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

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

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

Best Price Found

$686

Fastest flight time

8h 15m

Direct flights

Every day

Airports in Washington, D.C.

2 airports
The best one-way flight to Washington, D.C. from London Heathrow Airport in the past 72 hours is $686. The best round-trip flight deal from London Heathrow Airport to Washington, D.C. found on momondo in the last 72 hours is $569.
The fastest flight from London Heathrow Airport to Washington, D.C. takes 8h 15m
Direct flights go from London Heathrow Airport to Washington, D.C. every day.
There are 2 airports near Washington, D.C.: Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD)
Search flight deals

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

    The distance between London Heathrow and Washington, D.C. is about 3649.4 mi. A reasonable flight in good conditions will take 11h 05m.

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

    Prices for flights from London Heathrow Airport to Washington, D.C. are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The necessary travel and health documents for your Washington, D.C. trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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

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

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

Compare and see reviews for airlines that fly from London Heathrow Airport to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $320Free CancellationRating
7.9
7,996 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom $390Free CancellationRating
7.4
1,543 reviews
Search Scandinavian Airlines flights
Austrian AirlinesPriceFrom $431Free CancellationRating
7.6
861 reviews
Search Austrian Airlines flights
TAP AIR PORTUGALPriceFrom $473Free CancellationRating
7.1
2,033 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $510Free CancellationRating
7.1
562 reviews
Search Icelandair flights
American AirlinesPriceFrom $562Free CancellationRating
7.2
11,033 reviews
Search American Airlines flights
United AirlinesPriceFrom $567Free CancellationRating
7.4
8,996 reviews
Search United Airlines flights
British AirwaysPriceFrom $594Free CancellationRating
6.7
7,481 reviews
Search British Airways flights
Air CanadaPriceFrom $635Free CancellationRating
7.1
10,370 reviews
Search Air Canada flights
LufthansaPriceFrom $649Free CancellationRating
6.8
7,532 reviews
Search Lufthansa flights

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

    Delta flies from London Heathrow Airport to Washington, D.C. around 4 times per week, with 7,996 momondo users rating the airline 7.9/10. The cheapest Delta deal from London Heathrow Airport to Washington, D.C. in the last 72 hours was $320 (round-trip), much lower than the average airfare cost of $958 for Delta flights on this route.

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

    Across 861 Austrian Airlines reviews on momondo, the average score is 7.6/10. Austrian Airlines flies from London Heathrow Airport to Washington, D.C. about 14 times each week, with ticket deals ranging from $431 to $984. Price data is based on momondo searches in the last 72 hours.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Manassas
Reston
Gaithersburg
Fairfax
Glen Burnie
Springfield
Linthicum Heights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Washington, D.C. for you.

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

Yes. momondo enables you to select and highlight flights to Washington, D.C. from London with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington, D.C. from London.

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

Yes momondo offers price alerts on flights to Washington, D.C. from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Washington, D.C. trip

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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport