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Cheap flights from London Heathrow Airport to Washington, D.C. from $395

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 1/17. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
6:40 am - 5:15 pmLHR-IAD
15h 35m1 stop
Scandinavian Airlines Logo
8:30 pm - 4:25 pmIAD-LHR
14h 55m2 stops
$581Scandinavian Airlines
Find Deal
mié., feb. 11 - mié., feb. 25
Scandinavian Airlines Logo
7:05 am - 5:15 pmLHR-IAD
15h 10m2 stops
Scandinavian Airlines Logo
8:30 pm - 6:50 pmIAD-LHR
17h 20m2 stops
$585Scandinavian Airlines
Find Deal
mié., feb. 11 - mié., feb. 25
Scandinavian Airlines Logo
1:55 pm - 5:15 pmLHR-IAD
32h 20m2 stops
Scandinavian Airlines Logo
8:30 pm - 9:35 pmIAD-LHR
20h 05m2 stops
$588Scandinavian Airlines
Find Deal
dom., feb. 15 - sáb., feb. 21
United Airlines Logo
1:00 pm - 3:50 pmLHR-IAD
31h 50m1 stop
United Airlines Logo
10:15 pm - 10:50 amIAD-LHR
7h 35mnonstop
$589United Airlines
Find Deal
sáb., feb. 7 - dom., feb. 8
JetBlue Logo
9:20 am - 6:53 pmLHR-DCA
14h 33m1 stop
JetBlue Logo
10:00 am - 6:55 amDCA-LHR
15h 55m1 stop
$589JetBlue
Find Deal
mié., ene. 7 - jue., ene. 29
Virgin Atlantic Logo
8:25 pm - 5:05 pmLHR-IAD
24h 40m1 stop
Virgin Atlantic Logo
11:20 pm - 10:50 amIAD-LHR
7h 30mnonstop
$590Virgin Atlantic
Find Deal
lun., mar. 9 - mar., mar. 17
Virgin Atlantic Logo
4:50 pm - 8:30 pmLHR-IAD
8h 40mnonstop
Virgin Atlantic Logo
10:20 pm - 10:50 amIAD-LHR
7h 30mnonstop
$591Virgin Atlantic
Find Deal
mié., feb. 18 - sáb., feb. 28
Icelandair Logo
8:35 pm - 6:30 pmLHR-IAD
26h 55m1 stop
Icelandair Logo
7:40 pm - 10:50 amIAD-LHR
10h 10m1 stop
$592Icelandair
Find Deal
sáb., ene. 10 - sáb., ene. 17
Icelandair Logo
8:35 pm - 6:40 pmLHR-BWI
27h 05m1 stop
Icelandair Logo
7:40 pm - 10:50 amBWI-LHR
10h 10m1 stop
$595Icelandair
Find Deal
mar., ene. 6 - jue., ene. 29
American Airlines Logo
2:10 pm - 10:03 pmLHR-DCA
12h 53m1 stop
American Airlines Logo
4:43 pm - 8:20 amDCA-LHR
34h 37m2 stops
$620American Airlines
Find Deal
mié., ene. 7 - jue., ene. 29

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

Our best British Airways deals on London Heathrow Airport to Washington, D.C. flight tickets
British Airways
Feb 10
LHR7:30 amLondon Heathrow
14h 00m
1 stop
IAD4:30 pmWashington, D.C. Dulles Intl
Feb 20
IAD6:20 pmWashington, D.C. Dulles Intl
7h 10m
LHR6:30 amLondon Heathrow
$606
Find similar
British Airways
Feb 5
LHR7:30 amLondon Heathrow
14h 00m
1 stop
IAD4:30 pmWashington, D.C. Dulles Intl
Feb 10
IAD9:45 pmWashington, D.C. Dulles Intl
7h 15m
LHR10:00 amLondon Heathrow
$609
Find similar
British Airways
Mar 12
LHR12:10 pmLondon Heathrow
8h 25m
IAD4:35 pmWashington, D.C. Dulles Intl
Mar 19
IAD10:45 pmWashington, D.C. Dulles Intl
7h 15m
LHR10:00 amLondon Heathrow
$623
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
Feb 11
LHR6:40 amLondon Heathrow
15h 35m
1 stop
IAD5:15 pmWashington, D.C. Dulles Intl
Feb 25
IAD8:30 pmWashington, D.C. Dulles Intl
14h 55m
2 stops
LHR4:25 pmLondon Heathrow
$581
Find similar
Scandinavian Airlines
Feb 11
LHR7:05 amLondon Heathrow
15h 10m
2 stops
IAD5:15 pmWashington, D.C. Dulles Intl
Feb 25
IAD8:30 pmWashington, D.C. Dulles Intl
17h 20m
2 stops
LHR6:50 pmLondon Heathrow
$585
Find similar
Scandinavian Airlines
Feb 15
LHR1:55 pmLondon Heathrow
32h 20m
2 stops
IAD5:15 pmWashington, D.C. Dulles Intl
Feb 21
IAD8:30 pmWashington, D.C. Dulles Intl
20h 05m
2 stops
LHR9:35 pmLondon Heathrow
$588
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 noviembre 17, 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

mié. 2/11

6:40 am-5:15 pm

1 stop15h 35m

Washington, D.C. Dulles Intl

mié. 2/25

8:30 pm-4:25 pm

2 stops14h 55m

$581

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

mié. 2/11

7:05 am-5:15 pm

2 stops15h 10m

Washington, D.C. Dulles Intl

mié. 2/25

8:30 pm-6:50 pm

2 stops17h 20m

$585

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

dom. 2/15

1:55 pm-5:15 pm

2 stops32h 20m

Washington, D.C. Dulles Intl

sáb. 2/21

8:30 pm-9:35 pm

2 stops20h 05m

$588

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

sáb. 2/7

1:00 pm-3:50 pm

1 stop31h 50m

Washington, D.C. Dulles Intl

dom. 2/8

10:15 pm-10:50 am

Nonstop7h 35m

$589

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

mié. 1/7

9:20 am-6:53 pm

1 stop14h 33m

Washington, D.C. Reagan-National

jue. 1/29

10:00 am-6:55 am

1 stop15h 55m

$589

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

lun. 3/9

8:25 pm-5:05 pm

1 stop24h 40m

Washington, D.C. Dulles Intl

mar. 3/17

11:20 pm-10:50 am

Nonstop7h 30m

$590

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

mié. 2/18

4:50 pm-8:30 pm

Nonstop8h 40m

Washington, D.C. Dulles Intl

sáb. 2/28

10:20 pm-10:50 am

Nonstop7h 30m

$591

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

sáb. 1/10

8:35 pm-6:30 pm

1 stop26h 55m

Washington, D.C. Dulles Intl

sáb. 1/17

7:40 pm-10:50 am

1 stop10h 10m

$592

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

mar. 1/6

8:35 pm-6:40 pm

1 stop27h 05m

Baltimore/Washington

jue. 1/29

7:40 pm-10:50 am

1 stop10h 10m

$595

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

mié. 1/7

2:10 pm-10:03 pm

1 stop12h 53m

Washington, D.C. Reagan-National

jue. 1/29

4:43 pm-8:20 am

2 stops34h 37m

$620

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 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 $694.

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 $774 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 05m

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 05m
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 25m.

  • 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
8,006 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom $390Free CancellationRating
7.4
1,578 reviews
Search Scandinavian Airlines flights
Austrian AirlinesPriceFrom $431Free CancellationRating
7.6
873 reviews
Search Austrian Airlines flights
TAP AIR PORTUGALPriceFrom $473Free CancellationRating
7.1
2,062 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $510Free CancellationRating
7.0
580 reviews
Search Icelandair flights
American AirlinesPriceFrom $562Free CancellationRating
7.2
11,044 reviews
Search American Airlines flights
United AirlinesPriceFrom $567Free CancellationRating
7.4
9,013 reviews
Search United Airlines flights
British AirwaysPriceFrom $594Free CancellationRating
6.7
7,528 reviews
Search British Airways flights
Air CanadaPriceFrom $635Free CancellationRating
7.1
10,457 reviews
Search Air Canada flights
LufthansaPriceFrom $649Free CancellationRating
6.8
7,576 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 8,006 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 873 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

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mié. 12/17
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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