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Cheap flights from London Heathrow Airport to Washington, D.C. from $363

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 1/14. 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.
JetBlue Logo
9:20 am - 4:00 pmLHR-DCA
11h 40m1 stop
JetBlue Logo
3:40 pm - 6:55 amDCA-LHR
10h 15m1 stop
$572JetBlue
Find Deal
Tue, Dec 9 - Mon, Dec 15
Icelandair Logo
12:15 pm - 6:30 pmLHR-IAD
11h 15m1 stop
Icelandair Logo
7:40 pm - 10:50 amIAD-LHR
10h 10m1 stop
$573Icelandair
Find Deal
Wed, Jan 7 - Mon, Jan 12
Icelandair Logo
9:20 am - 8:05 amLHR-DCA
27h 45m1 stop
Icelandair Logo
6:59 pm - 6:55 amDCA-LHR
30h 56m1 stop
$574Icelandair
Find Deal
Wed, Dec 10 - Sun, Dec 14
British Airways Logo
8:25 am - 4:30 pmLHR-IAD
13h 05m1 stop
British Airways Logo
6:20 pm - 6:30 amIAD-LHR
7h 10mnonstop
$601British Airways
Find Deal
Tue, Feb 3 - Mon, Feb 16
British Airways Logo
6:05 am - 4:30 pmLHR-IAD
15h 25m1 stop
British Airways Logo
6:20 pm - 6:30 amIAD-LHR
7h 10mnonstop
$602British Airways
Find Deal
Tue, Jan 27 - Tue, Feb 3
Virgin Atlantic Logo
8:25 pm - 4:05 pmLHR-IAD
24h 40m1 stop
Virgin Atlantic Logo
10:20 pm - 10:50 amIAD-LHR
7h 30mnonstop
$605Virgin Atlantic
Find Deal
Wed, Dec 3 - Wed, Dec 10
Virgin Atlantic Logo
5:35 pm - 11:31 pmLHR-BWI
34h 56m2 stops
Virgin Atlantic Logo
11:30 am - 6:25 amBWI-LHR
13h 55m1 stop
$612Virgin Atlantic
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Wed, Dec 24 - Wed, Dec 31
Delta Logo
11:45 am - 12:19 amLHR-BWI
17h 34m2 stops
Delta Logo
10:47 am - 6:25 amBWI-LHR
14h 38m2 stops
$636Delta
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Thu, Dec 11 - Tue, Dec 16
Delta Logo
11:45 am - 10:59 pmLHR-BWI
15h 14m2 stops
Delta Logo
2:10 pm - 10:15 amBWI-LHR
16h 05m2 stops
$642Delta
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Fri, Mar 13 - Sun, Mar 15
United Airlines Logo
1:25 pm - 3:31 pmLHR-DCA
31h 06m1 stop
United Airlines Logo
6:00 am - 9:20 pmDCA-LHR
10h 20m1 stop
$643United Airlines
Find Deal
Sat, Dec 13 - Mon, Dec 15

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

Our best Icelandair deals on London Heathrow Airport to Washington, D.C. flight tickets
Icelandair
Jan 7
LHR12:15 pmLondon Heathrow
11h 15m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
Jan 12
IAD7:40 pmWashington, D.C. Dulles Intl
10h 10m
1 stop
LHR10:50 amLondon Heathrow
$573
Find similar
Icelandair
Dec 10
LHR9:20 amLondon Heathrow
27h 45m
1 stop
DCA8:05 amWashington, D.C. Reagan-National
Dec 14
DCA6:59 pmWashington, D.C. Reagan-National
30h 56m
1 stop
LHR6:55 amLondon Heathrow
$574
Find similar
Icelandair
Mar 9
LHR9:20 amLondon Heathrow
13h 35m
1 stop
DCA6:55 pmWashington, D.C. Reagan-National
Mar 17
DCA1:55 pmWashington, D.C. Reagan-National
13h 00m
1 stop
LHR6:55 amLondon Heathrow
$575
Find similar

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
Jan 26
LHR6:40 amLondon Heathrow
13h 40m
1 stop
IAD3:20 pmWashington, D.C. Dulles Intl
Jan 31
IAD8:30 pmWashington, D.C. Dulles Intl
14h 55m
2 stops
LHR4:25 pmLondon Heathrow
$576
Find similar
Scandinavian Airlines
Feb 2
LHR7:05 amLondon Heathrow
15h 10m
2 stops
IAD5:15 pmWashington, D.C. Dulles Intl
Feb 9
IAD8:30 pmWashington, D.C. Dulles Intl
16h 10m
1 stop
LHR5:40 pmLondon Heathrow
$578
Find similar
Scandinavian Airlines
Feb 2
LHR10:20 amLondon Heathrow
11h 55m
1 stop
IAD5:15 pmWashington, D.C. Dulles Intl
Feb 9
IAD8:30 pmWashington, D.C. Dulles Intl
17h 20m
2 stops
LHR6:50 pmLondon Heathrow
$579
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 November 10, 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 - DCA

LHRDCA

London Heathrow

Tue 12/9

9:20 am-4:00 pm

1 stop11h 40m

Washington, D.C. Reagan-National

Mon 12/15

3:40 pm-6:55 am

1 stop10h 15m

$572

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 1/7

12:15 pm-6:30 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Mon 1/12

7:40 pm-10:50 am

1 stop10h 10m

$573

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 12/10

9:20 am-8:05 am

1 stop27h 45m

Washington, D.C. Reagan-National

Sun 12/14

6:59 pm-6:55 am

1 stop30h 56m

$574

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 2/3

8:25 am-4:30 pm

1 stop13h 05m

Washington, D.C. Dulles Intl

Mon 2/16

6:20 pm-6:30 am

Nonstop7h 10m

$601

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 1/27

6:05 am-4:30 pm

1 stop15h 25m

Washington, D.C. Dulles Intl

Tue 2/3

6:20 pm-6:30 am

Nonstop7h 10m

$602

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 12/3

8:25 pm-4:05 pm

1 stop24h 40m

Washington, D.C. Dulles Intl

Wed 12/10

10:20 pm-10:50 am

Nonstop7h 30m

$605

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Wed 12/24

5:35 pm-11:31 pm

2 stops34h 56m

Baltimore/Washington

Wed 12/31

11:30 am-6:25 am

1 stop13h 55m

$612

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Thu 12/11

11:45 am-12:19 am

2 stops17h 34m

Baltimore/Washington

Tue 12/16

10:47 am-6:25 am

2 stops14h 38m

$636

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Fri 3/13

11:45 am-10:59 pm

2 stops15h 14m

Baltimore/Washington

Sun 3/15

2:10 pm-10:15 am

2 stops16h 05m

$642

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Sat 12/13

1:25 pm-3:31 pm

1 stop31h 06m

Washington, D.C. Reagan-National

Mon 12/15

6:00 am-9:20 pm

1 stop10h 20m

$643

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 November is your next best option. Flight prices from London Heathrow Airport to Washington, D.C. during November average around $693.

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 $777. 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 $936.

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 $867. 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 $772 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 $693 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 November 2025, prices for London Heathrow Airport to Washington, D.C. flights are approximately 43% 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

$699

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 $699. The best round-trip flight deal from London Heathrow Airport to Washington, D.C. found on momondo in the last 72 hours is $706.
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 8h 30m.

  • 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
8,004 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom $390Free CancellationRating
7.4
1,570 reviews
Search Scandinavian Airlines flights
Austrian AirlinesPriceFrom $431Free CancellationRating
7.6
864 reviews
Search Austrian Airlines flights
TAP AIR PORTUGALPriceFrom $473Free CancellationRating
7.1
2,057 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $510Free CancellationRating
7.0
574 reviews
Search Icelandair flights
American AirlinesPriceFrom $562Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights
United AirlinesPriceFrom $567Free CancellationRating
7.4
9,011 reviews
Search United Airlines flights
British AirwaysPriceFrom $594Free CancellationRating
6.7
7,508 reviews
Search British Airways flights
Air CanadaPriceFrom $635Free CancellationRating
7.1
10,429 reviews
Search Air Canada flights
LufthansaPriceFrom $649Free CancellationRating
6.8
7,562 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 7 times per week, with 8,004 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 $968 for Delta flights on this route.

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

    Across 864 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 $858. 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
Reston
Manassas
Gaithersburg
Fairfax
Glen Burnie
Linthicum Heights
Springfield

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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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