Cheap flights from London Heathrow Airport to Washington, D.C. from $447

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 11/11. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
1:05 pm - 10:15 pm
LHR
-
IAD
14h 10m
1 stop
Icelandair Logo
11:20 pm - 8:20 pm
IAD
-
LHR
16h 00m
1 stop
$619Icelandair
Tue, Sep 15 - Fri, Sep 25
Icelandair Logo
1:05 pm - 7:20 pm
LHR
-
IAD
11h 15m
1 stop
Icelandair Logo
8:30 pm - 11:55 am
IAD
-
LHR
10h 25m
1 stop
$622Icelandair
Thu, Sep 24 - Thu, Oct 1
British Airways Logo
5:05 pm - 8:20 pm
LHR
-
IAD
8h 15mnonstop
British Airways Logo
10:25 pm - 10:50 am
IAD
-
LHR
7h 25mnonstop
$630British Airways
Thu, Jun 18 - Sun, Jun 28
United Airlines Logo
8:00 am - 6:11 pm
LHR
-
DCA
15h 11m
1 stop
United Airlines Logo
4:25 pm - 8:20 am
DCA
-
LHR
10h 55m
1 stop
$649United Airlines
Mon, Jul 20 - Sun, Aug 9
American Airlines Logo
8:15 am - 5:41 pm
LHR
-
BWI
14h 26m
2 stops
American Airlines Logo
3:54 pm - 8:30 am
BWI
-
LHR
36h 36m
2 stops
$663American Airlines
Wed, Oct 21 - Mon, Oct 26
American Airlines Logo
12:15 pm - 11:59 pm
LHR
-
DCA
16h 44m
1 stop
American Airlines Logo
12:59 pm - 8:00 am
DCA
-
LHR
14h 01m
1 stop
$665American Airlines
Tue, Jun 16 - Tue, Jun 30
British Airways Logo
2:00 pm - 5:15 pm
LHR
-
BWI
8h 15mnonstop
British Airways Logo
9:30 pm - 9:50 am
BWI
-
LHR
7h 20mnonstop
$666British Airways
Wed, Sep 9 - Mon, Sep 21
Virgin Atlantic Logo
11:30 am - 10:09 am
LHR
-
DCA
27h 39m
2 stops
Virgin Atlantic Logo
6:02 am - 6:20 am
DCA
-
LHR
19h 18m
1 stop
$669Virgin Atlantic
Tue, Jul 28 - Sat, Aug 8
Virgin Atlantic Logo
1:25 pm - 10:48 pm
LHR
-
DCA
14h 23m
1 stop
Virgin Atlantic Logo
11:00 am - 6:45 am
DCA
-
LHR
14h 45m
1 stop
$673Virgin Atlantic
Tue, Jul 21 - Tue, Sep 1
United Airlines Logo
11:05 am - 9:32 pm
LHR
-
BWI
15h 27m
1 stop
United Airlines Logo
5:40 pm - 11:55 am
BWI
-
LHR
13h 15m
1 stop
$679United Airlines
Sat, Aug 1 - Sat, Aug 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
Sep 15
LHR1:05 pmLondon Heathrow
14h 10m
1 stop
IAD10:15 pmWashington, D.C. Dulles Intl
Sep 25
IAD11:20 pmWashington, D.C. Dulles Intl
16h 00m
1 stop
LHR8:20 pmLondon Heathrow
$619
Icelandair
Sep 24
LHR1:05 pmLondon Heathrow
11h 15m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
Oct 1
IAD8:30 pmWashington, D.C. Dulles Intl
10h 25m
1 stop
LHR11:55 amLondon Heathrow
$622
Icelandair
Sep 17
LHR1:05 pmLondon Heathrow
11h 15m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
Sep 21
IAD8:30 pmWashington, D.C. Dulles Intl
18h 50m
1 stop
LHR8:20 pmLondon Heathrow
$623

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
Oct 1
LHR8:40 amLondon Heathrow
11h 55m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Oct 22
IAD10:55 pmWashington, D.C. Dulles Intl
7h 25m
LHR11:20 amLondon Heathrow
$653
Virgin Atlantic
Jul 28
LHR11:30 amLondon Heathrow
27h 39m
2 stops
DCA10:09 amWashington, D.C. Reagan-National
Aug 8
DCA6:02 amWashington, D.C. Reagan-National
19h 18m
1 stop
LHR6:20 amLondon Heathrow
$669
Virgin Atlantic
Jul 21
LHR1:25 pmLondon Heathrow
14h 23m
1 stop
DCA10:48 pmWashington, D.C. Reagan-National
Sep 1
DCA11:00 amWashington, D.C. Reagan-National
14h 45m
1 stop
LHR6:45 amLondon Heathrow
$673

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 May 18, 2026.
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

Cheapest round-trip

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 9/15

1:05 pm-10:15 pm

1 stop14h 10m

Washington, D.C. Dulles Intl

Fri 9/25

11:20 pm-8:20 pm

1 stop16h 00m

$619

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 9/24

1:05 pm-7:20 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Thu 10/1

8:30 pm-11:55 am

1 stop10h 25m

$622

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 6/18

5:05 pm-8:20 pm

Nonstop8h 15m

Washington, D.C. Dulles Intl

Sun 6/28

10:25 pm-10:50 am

Nonstop7h 25m

$630

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Mon 7/20

8:00 am-6:11 pm

1 stop15h 11m

Washington, D.C. Reagan-National

Sun 8/9

4:25 pm-8:20 am

1 stop10h 55m

$649

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Wed 10/21

8:15 am-5:41 pm

2 stops14h 26m

Baltimore/Washington

Mon 10/26

3:54 pm-8:30 am

2 stops36h 36m

$663

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Tue 6/16

12:15 pm-11:59 pm

1 stop16h 44m

Washington, D.C. Reagan-National

Tue 6/30

12:59 pm-8:00 am

1 stop14h 01m

$665
Quickest round-trip

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Wed 9/9

2:00 pm-5:15 pm

Nonstop8h 15m

Baltimore/Washington

Mon 9/21

9:30 pm-9:50 am

Nonstop7h 20m

$666

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Tue 7/28

11:30 am-10:09 am

2 stops27h 39m

Washington, D.C. Reagan-National

Sat 8/8

6:02 am-6:20 am

1 stop19h 18m

$669

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Tue 7/21

1:25 pm-10:48 pm

1 stop14h 23m

Washington, D.C. Reagan-National

Tue 9/1

11:00 am-6:45 am

1 stop14h 45m

$673

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Sat 8/1

11:05 am-9:32 pm

1 stop15h 27m

Baltimore/Washington

Sat 8/15

5:40 pm-11:55 am

1 stop13h 15m

$679

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 January is, on average, the cheapest month to fly to Washington, D.C. from London Heathrow Airport, with most prices found around $354. If you’re not able to fly to Washington, D.C. in January, then February is your next best option. Flight prices from London Heathrow Airport to Washington, D.C. during February average around $433.

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 $750. 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 $856.

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

At noon 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 $790. Flying to Washington, D.C. at noon 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 $815. 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 from London Heathrow Airport 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 $730 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 $655 on momondo.

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

You could potentially save up to 17% 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 May 2026, prices for London Heathrow Airport to Washington, D.C. flights are approximately 17% 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

$742

Fastest flight time

8h 00m

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 $742. The best round-trip flight deal from London Heathrow Airport to Washington, D.C. found on momondo in the last 72 hours is $692.
The fastest flight from London Heathrow Airport to Washington, D.C. takes 8h 00m
Direct flights go from London Heathrow Airport to Washington, D.C. every day.
There are 2 airports in Washington, D.C.. From London Heathrow Airport there are direct flights to Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD).

Frequently asked questions about flying from London Heathrow Airport to Washington, D.C.

  • 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 00m.

  • 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
8,451 reviews
Search Delta flights
IcelandairPriceFrom $466Free CancellationRating
7.0
656 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $473Free CancellationRating
7.2
2,253 reviews
Search TAP AIR PORTUGAL flights
Austrian AirlinesPriceFrom $534Free CancellationRating
7.6
913 reviews
Search Austrian Airlines flights
LufthansaPriceFrom $536Free CancellationRating
6.8
8,010 reviews
Search Lufthansa flights
American AirlinesPriceFrom $559Free CancellationRating
7.1
11,648 reviews
Search American Airlines flights
United AirlinesPriceFrom $567Free CancellationRating
7.4
9,736 reviews
Search United Airlines flights
British AirwaysPriceFrom $571Free CancellationRating
6.7
7,989 reviews
Search British Airways flights
Air CanadaPriceFrom $635Free CancellationRating
7.1
11,062 reviews
Search Air Canada flights
Aer LingusPriceFrom $658Free CancellationRating
7.3
1,566 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 8,452 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 $907 for Delta flights on this route.

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

    Across 914 Austrian Airlines reviews on momondo, the average score is 7.6/10. Austrian Airlines flies from London Heathrow Airport to Washington, D.C. about 13 times each week, with ticket deals ranging from $534 to $743. 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
Waldorf
Woodbridge
Laurel
Gaithersburg
Colonial Beach
Fredericksburg
Silver Spring
Towson
Rockville
Manassas
Linthicum Heights
Tysons
Bethesda
Springfield
Fairfax
College Park

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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1 adult
Wed 6/17
Wed 6/24

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.