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Cheap flights from London Heathrow Airport to Washington, D.C. from €463

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 11/1. 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 return flights

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Scandinavian Airlines Logo
07:05 - 18:15LHR-IAD
15h 10m2 stops
Scandinavian Airlines Logo
21:30 - 18:50IAD-LHR
17h 20m2 stops
€524Scandinavian Airlines
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Thu, 12 Mar - Mon, 16 Mar
Scandinavian Airlines Logo
07:05 - 17:15LHR-IAD
15h 10m2 stops
Scandinavian Airlines Logo
21:30 - 18:50IAD-LHR
17h 20m2 stops
€525Scandinavian Airlines
Find Deal
Thu, 29 Jan - Thu, 12 Mar
Delta Logo
06:30 - 17:04LHR-BWI
15h 34m2 stops
Delta Logo
11:29 - 09:00BWI-LHR
16h 31m1 stop
€545Delta
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Sat, 13 Dec - Sun, 18 Jan
Virgin Atlantic Logo
06:30 - 17:16LHR-BWI
15h 46m2 stops
Virgin Atlantic Logo
10:47 - 08:45BWI-LHR
16h 58m1 stop
€547Virgin Atlantic
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Thu, 4 Dec - Wed, 10 Dec
Virgin Atlantic Logo
11:30 - 23:03LHR-BWI
16h 33m2 stops
Virgin Atlantic Logo
16:45 - 11:55BWI-LHR
14h 10m2 stops
€549Virgin Atlantic
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Mon, 15 Dec - Sun, 18 Jan
Delta Logo
08:40 - 19:28LHR-BWI
15h 48m2 stops
Delta Logo
10:55 - 06:50BWI-LHR
14h 55m1 stop
€553Delta
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Thu, 27 Nov - Tue, 9 Dec
KLM Logo
06:30 - 16:51LHR-BWI
15h 21m2 stops
KLM Logo
18:59 - 11:40BWI-LHR
11h 41m1 stop
€562KLM
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Mon, 15 Dec - Fri, 16 Jan
KLM Logo
06:30 - 16:40LHR-BWI
15h 10m2 stops
KLM Logo
15:38 - 06:50BWI-LHR
10h 12m1 stop
€563KLM
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Fri, 23 Jan - Mon, 26 Jan
Icelandair Logo
12:15 - 18:30LHR-IAD
11h 15m1 stop
Icelandair Logo
19:40 - 10:50IAD-LHR
10h 10m1 stop
€564Icelandair
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Thu, 27 Nov - Sun, 7 Dec
Icelandair Logo
20:35 - 18:30LHR-IAD
26h 55m1 stop
Icelandair Logo
19:40 - 10:50IAD-LHR
10h 10m1 stop
€566Icelandair
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Sun, 23 Nov - Sat, 6 Dec

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
14 Nov
LHR12:15London Heathrow
11h 15m
1 stop
IAD18:30Washington, D.C. Dulles Intl
15 Dec
IAD19:40Washington, D.C. Dulles Intl
18h 50m
1 stop
LHR19:30London Heathrow
€564
Find similar
Icelandair
23 Nov
LHR20:35London Heathrow
26h 55m
1 stop
IAD18:30Washington, D.C. Dulles Intl
7 Dec
IAD19:40Washington, D.C. Dulles Intl
10h 10m
1 stop
LHR10:50London Heathrow
€566
Find similar
Icelandair
22 Nov
LHR12:15London Heathrow
11h 25m
1 stop
BWI18:40Baltimore/Washington
10 Dec
BWI19:40Baltimore/Washington
18h 50m
1 stop
LHR19:30London Heathrow
€574
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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
12 Mar
LHR07:05London Heathrow
15h 10m
2 stops
IAD18:15Washington, D.C. Dulles Intl
16 Mar
IAD21:30Washington, D.C. Dulles Intl
17h 20m
2 stops
LHR18:50London Heathrow
€524
Find similar
Scandinavian Airlines
29 Jan
LHR07:05London Heathrow
15h 10m
2 stops
IAD17:15Washington, D.C. Dulles Intl
12 Mar
IAD21:30Washington, D.C. Dulles Intl
17h 20m
2 stops
LHR18:50London Heathrow
€525
Find similar
Scandinavian Airlines
26 Nov
LHR19:50London Heathrow
26h 25m
2 stops
IAD17:15Washington, D.C. Dulles Intl
6 Dec
IAD20:30Washington, D.C. Dulles Intl
14h 55m
2 stops
LHR16:25London Heathrow
€543
Find similar

momondo Fare Finder

 
Customise 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 13,528 searches. Data last updated 31 October 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 12/3

07:05-18:15

2 stops15h 10m

Washington, D.C. Dulles Intl

Mon 16/3

21:30-18:50

2 stops17h 20m

€524

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 29/1

07:05-17:15

2 stops15h 10m

Washington, D.C. Dulles Intl

Thu 12/3

21:30-18:50

2 stops17h 20m

€525

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Sat 13/12

06:30-17:04

2 stops15h 34m

Baltimore/Washington

Sun 18/1

11:29-09:00

1 stop16h 31m

€545

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Thu 4/12

06:30-17:16

2 stops15h 46m

Baltimore/Washington

Wed 10/12

10:47-08:45

1 stop16h 58m

€547

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Mon 15/12

11:30-23:03

2 stops16h 33m

Baltimore/Washington

Sun 18/1

16:45-11:55

2 stops14h 10m

€549

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Thu 27/11

08:40-19:28

2 stops15h 48m

Baltimore/Washington

Tue 9/12

10:55-06:50

1 stop14h 55m

€553

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Mon 15/12

06:30-16:51

2 stops15h 21m

Baltimore/Washington

Fri 16/1

18:59-11:40

1 stop11h 41m

€562

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Fri 23/1

06:30-16:40

2 stops15h 10m

Baltimore/Washington

Mon 26/1

15:38-06:50

1 stop10h 12m

€563

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 27/11

12:15-18:30

1 stop11h 15m

Washington, D.C. Dulles Intl

Sun 7/12

19:40-10:50

1 stop10h 10m

€564

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 23/11

20:35-18:30

1 stop26h 55m

Washington, D.C. Dulles Intl

Sat 6/12

19:40-10:50

1 stop10h 10m

€566

Flights are sorted by cheapest return 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 cheapest month to fly to Washington, D.C. from London Heathrow Airport is in September. Flight prices, which tend to average around €559, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Washington, D.C. from London Heathrow Airport during February instead. Flights to Washington, D.C. in February, while not as cheap as those in September, still average around €602.

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 €675 when searching weeks before you fly. 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 €636 on momondo.

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

There is only 1 cabin class 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.

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 return 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.

Fastest flight time

8h 05m

Direct flights

Every day

Airports in Washington, D.C.

2 airports
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?

    Washington, D.C. is 5873.1 km away from London Heathrow. 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 refreshed on a daily basis.

  • 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 stopovers. 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 travel and health documents required for your trip to Washington, D.C. can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Washington, D.C.. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Gettysburg

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Washington, D.C.. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for London to Washington, D.C. flights to just show those with flexible booking policies.

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?

If you are not ready to book a flight from London to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they 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 36.1 km from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport