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Cheap flights from London Heathrow Airport to Washington, D.C. from $486

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 9/25. 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

Virgin Atlantic Logo
4:50 pm - 8:30 pmLHR-IAD
8h 40mnonstop
Virgin Atlantic Logo
10:20 pm - 10:50 amIAD-LHR
7h 30mnonstop
$529Virgin Atlantic
Find Deal
mar., feb. 3 - mié., feb. 18
Lufthansa Logo
6:30 am - 1:30 pmLHR-IAD
12h 00m1 stop
Lufthansa Logo
6:40 pm - 6:55 amIAD-LHR
7h 15mnonstop
$530Lufthansa
Find Deal
lun., oct. 6 - lun., oct. 13
Aer Lingus Logo
9:50 am - 3:50 pmLHR-IAD
11h 00m1 stop
Aer Lingus Logo
8:25 pm - 12:40 pmIAD-LHR
11h 15m1 stop
$531Aer Lingus
Find Deal
jue., oct. 9 - lun., oct. 13
United Airlines Logo
9:00 am - 4:40 pmLHR-IAD
12h 40m1 stop
United Airlines Logo
9:00 am - 7:10 amIAD-LHR
17h 10m2 stops
$532United Airlines
Find Deal
sáb., nov. 8 - lun., nov. 17
United Airlines Logo
9:00 am - 5:40 pmLHR-IAD
12h 40m1 stop
United Airlines Logo
5:33 pm - 9:10 amIAD-LHR
10h 37m1 stop
$533United Airlines
Find Deal
mar., oct. 28 - mar., nov. 11
British Airways Logo
4:25 pm - 7:55 pmLHR-IAD
8h 30mnonstop
British Airways Logo
9:45 pm - 10:00 amIAD-LHR
7h 15mnonstop
$542British Airways
Find Deal
lun., nov. 24 - mar., dic. 2
British Airways Logo
3:25 pm - 7:45 pmLHR-BWI
8h 20mnonstop
British Airways Logo
8:35 pm - 8:40 amBWI-LHR
7h 05mnonstop
$542British Airways
Find Deal
mar., oct. 28 - jue., nov. 6
Icelandair Logo
12:15 pm - 6:40 pmLHR-BWI
11h 25m1 stop
Icelandair Logo
7:40 pm - 10:50 amBWI-LHR
10h 10m1 stop
$544Icelandair
Find Deal
dom., nov. 9 - sáb., nov. 15
Icelandair Logo
12:15 pm - 7:40 pmLHR-BWI
11h 25m1 stop
Icelandair Logo
7:40 pm - 10:50 amBWI-LHR
10h 10m1 stop
$545Icelandair
Find Deal
sáb., nov. 1 - mar., nov. 11
Delta Logo
11:45 am - 5:05 pmLHR-IAD
33h 20m1 stop
Delta Logo
10:05 am - 6:25 amIAD-LHR
15h 20m1 stop
$574Delta
Find Deal
lun., oct. 27 - jue., nov. 13

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

Our best Finnair deals on London Heathrow Airport to Washington, D.C. flight tickets
Finnair
Oct 3
LHR7:05 pmLondon Heathrow
23h 44m
2 stops
IAD1:49 pmWashington, D.C. Dulles Intl
Oct 6
IAD9:19 amWashington, D.C. Dulles Intl
16h 01m
2 stops
LHR6:20 amLondon Heathrow
$556
Find similar
Finnair
Sep 23
LHR9:15 amLondon Heathrow
13h 35m
1 stop
BWI5:50 pmBaltimore/Washington
Sep 30
BWI11:04 amBaltimore/Washington
14h 51m
2 stops
LHR6:55 amLondon Heathrow
$557
Find similar
Finnair
Oct 28
LHR3:25 pmLondon Heathrow
8h 20m
BWI7:45 pmBaltimore/Washington
Nov 6
BWI11:58 amBaltimore/Washington
15h 17m
1 stop
LHR8:15 amLondon Heathrow
$561
Find similar

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

Our best Lufthansa deals on London Heathrow Airport to Washington, D.C. flight tickets
Lufthansa
Oct 6
LHR6:30 amLondon Heathrow
12h 00m
1 stop
IAD1:30 pmWashington, D.C. Dulles Intl
Oct 13
IAD6:40 pmWashington, D.C. Dulles Intl
7h 15m
LHR6:55 amLondon Heathrow
$530
Find similar
Lufthansa
Nov 3
LHR7:40 amLondon Heathrow
12h 55m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Nov 10
IAD6:20 pmWashington, D.C. Dulles Intl
7h 20m
LHR6:40 amLondon Heathrow
$537
Find similar
Lufthansa
Oct 3
LHR4:40 pmLondon Heathrow
8h 15m
IAD7:55 pmWashington, D.C. Dulles Intl
Oct 9
IAD3:25 pmWashington, D.C. Dulles Intl
11h 15m
1 stop
LHR7:40 amLondon Heathrow
$572
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 septiembre 11, 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

mar. 2/3

4:50 pm-8:30 pm

Nonstop8h 40m

Washington, D.C. Dulles Intl

mié. 2/18

10:20 pm-10:50 am

Nonstop7h 30m

$529

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

lun. 10/6

6:30 am-1:30 pm

1 stop12h 00m

Washington, D.C. Dulles Intl

lun. 10/13

6:40 pm-6:55 am

Nonstop7h 15m

$530

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

jue. 10/9

9:50 am-3:50 pm

1 stop11h 00m

Washington, D.C. Dulles Intl

lun. 10/13

8:25 pm-12:40 pm

1 stop11h 15m

$531

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

sáb. 11/8

9:00 am-4:40 pm

1 stop12h 40m

Washington, D.C. Dulles Intl

lun. 11/17

9:00 am-7:10 am

2 stops17h 10m

$532

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

mar. 10/28

9:00 am-5:40 pm

1 stop12h 40m

Washington, D.C. Dulles Intl

mar. 11/11

5:33 pm-9:10 am

1 stop10h 37m

$533

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

lun. 11/24

4:25 pm-7:55 pm

Nonstop8h 30m

Washington, D.C. Dulles Intl

mar. 12/2

9:45 pm-10:00 am

Nonstop7h 15m

$542

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

mar. 10/28

3:25 pm-7:45 pm

Nonstop8h 20m

Baltimore/Washington

jue. 11/6

8:35 pm-8:40 am

Nonstop7h 05m

$542

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

dom. 11/9

12:15 pm-6:40 pm

1 stop11h 25m

Baltimore/Washington

sáb. 11/15

7:40 pm-10:50 am

1 stop10h 10m

$544

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

sáb. 11/1

12:15 pm-7:40 pm

1 stop11h 25m

Baltimore/Washington

mar. 11/11

7:40 pm-10:50 am

1 stop10h 10m

$545

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

lun. 10/27

11:45 am-5:05 pm

1 stop33h 20m

Washington, D.C. Dulles Intl

jue. 11/13

10:05 am-6:25 am

1 stop15h 20m

$574

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 February is, on average, the cheapest month to fly to Washington, D.C. from London Heathrow Airport, with most prices found around $698. If you’re not able to fly to Washington, D.C. in February, then September is your next best option. Flight prices from London Heathrow Airport to Washington, D.C. during September average around $702.

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 $806. 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 $938.

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 at noon because they tend to be around $869. 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 Washington, D.C. Dulles Intl 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 $793 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 $729 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?

You could potentially save up to 21% on your flight if you consider stops on a London Heathrow Airport to Washington, D.C. flight.

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

As of September 2025, prices for London Heathrow Airport to Washington, D.C. flights are approximately 50% 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

$693

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 $693. The best round-trip flight deal from London Heathrow Airport to Washington, D.C. found on momondo in the last 72 hours is $602.
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 15m.

  • 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
7,960 reviews
Search Delta flights
Scandinavian AirlinesPriceFrom $390Free CancellationRating
7.4
1,484 reviews
Search Scandinavian Airlines flights
Austrian AirlinesPriceFrom $431Free CancellationRating
7.6
850 reviews
Search Austrian Airlines flights
TAP AIR PORTUGALPriceFrom $473Free CancellationRating
7.1
1,977 reviews
Search TAP AIR PORTUGAL flights
IcelandairPriceFrom $490Free CancellationRating
7.0
546 reviews
Search Icelandair flights
British AirwaysPriceFrom $595Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
American AirlinesPriceFrom $619Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $630Free CancellationRating
7.4
8,937 reviews
Search United Airlines flights
Air CanadaPriceFrom $635Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
Aer LingusPriceFrom $652Free CancellationRating
7.2
1,271 reviews
Search Aer Lingus 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 7,960 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 $949 for Delta flights on this route.

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

    Across 850 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
Gettysburg
National Harbor
Arlington
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Manassas
Reston
Fairfax
Gaithersburg
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.

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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