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Cheap flights from London Heathrow Airport to Washington, D.C. from €460

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 27/1. 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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Cheap return flights

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Scandinavian Airlines Logo
06:40 - 17:15LHR-IAD
15h 35m2 stops
Scandinavian Airlines Logo
20:30 - 16:25IAD-LHR
14h 55m2 stops
€527Scandinavian Airlines
Find Deal
Wed, 21 Jan - Wed, 28 Jan
Scandinavian Airlines Logo
06:40 - 17:15LHR-IAD
15h 35m1 stop
Scandinavian Airlines Logo
20:30 - 09:20IAD-LHR
31h 50m1 stop
€528Scandinavian Airlines
Find Deal
Thu, 12 Feb - Mon, 16 Feb
Scandinavian Airlines Logo
07:05 - 17:15LHR-IAD
15h 10m2 stops
Scandinavian Airlines Logo
20:30 - 18:30IAD-LHR
17h 00m1 stop
€534Scandinavian Airlines
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Wed, 18 Feb - Sat, 28 Feb
Aer Lingus Logo
07:50 - 15:35LHR-IAD
12h 45m1 stop
Aer Lingus Logo
17:05 - 11:25IAD-LHR
13h 20m1 stop
€536Aer Lingus
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Thu, 8 Jan - Wed, 14 Jan
Scandinavian Airlines Logo
07:05 - 17:15LHR-IAD
15h 10m2 stops
Scandinavian Airlines Logo
20:30 - 18:50IAD-LHR
17h 20m2 stops
€537Scandinavian Airlines
Find Deal
Wed, 18 Feb - Sat, 28 Feb
TAP AIR PORTUGAL Logo
12:25 - 21:00LHR-IAD
13h 35m1 stop
TAP AIR PORTUGAL Logo
17:30 - 12:40IAD-LHR
14h 10m1 stop
€541TAP AIR PORTUGAL
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Fri, 5 Dec - Tue, 6 Jan
British Airways Logo
06:15 - 16:30LHR-IAD
15h 15m1 stop
British Airways Logo
18:20 - 06:30IAD-LHR
7h 10mdirect
€546British Airways
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Thu, 15 Jan - Sat, 31 Jan
British Airways Logo
08:25 - 16:30LHR-IAD
13h 05m1 stop
British Airways Logo
21:45 - 10:00IAD-LHR
7h 15mdirect
€548British Airways
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Tue, 20 Jan - Mon, 26 Jan
Delta Logo
11:45 - 22:55LHR-BWI
16h 10m2 stops
Delta Logo
11:45 - 06:25BWI-LHR
13h 40m2 stops
€562Delta
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Thu, 19 Feb - Mon, 23 Feb
Delta Logo
08:40 - 23:32LHR-BWI
19h 52m2 stops
Delta Logo
12:34 - 09:00BWI-LHR
15h 26m2 stops
€572Delta
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Wed, 24 Dec - Wed, 31 Dec

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
21 Jan
LHR06:40London Heathrow
15h 35m
2 stops
IAD17:15Washington, D.C. Dulles Intl
28 Jan
IAD20:30Washington, D.C. Dulles Intl
14h 55m
2 stops
LHR16:25London Heathrow
€527
Find similar
Scandinavian Airlines
12 Feb
LHR06:40London Heathrow
15h 35m
1 stop
IAD17:15Washington, D.C. Dulles Intl
16 Feb
IAD20:30Washington, D.C. Dulles Intl
31h 50m
1 stop
LHR09:20London Heathrow
€528
Find similar
Scandinavian Airlines
18 Feb
LHR07:05London Heathrow
15h 10m
2 stops
IAD17:15Washington, D.C. Dulles Intl
28 Feb
IAD20:30Washington, D.C. Dulles Intl
17h 00m
1 stop
LHR18:30London Heathrow
€534
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TAP AIR PORTUGAL flights from London Heathrow Airport to Washington, D.C.

Our best TAP AIR PORTUGAL deals on London Heathrow Airport to Washington, D.C. flight tickets
TAP AIR PORTUGAL
5 Dec
LHR12:25London Heathrow
13h 35m
1 stop
IAD21:00Washington, D.C. Dulles Intl
6 Jan
IAD17:30Washington, D.C. Dulles Intl
14h 10m
1 stop
LHR12:40London Heathrow
€541
Find similar
TAP AIR PORTUGAL
11 Dec
LHR06:00London Heathrow
14h 15m
1 stop
IAD15:15Washington, D.C. Dulles Intl
30 Dec
IAD17:30Washington, D.C. Dulles Intl
23h 05m
1 stop
LHR21:35London Heathrow
€565
Find similar
TAP AIR PORTUGAL
4 Dec
LHR06:00London Heathrow
14h 15m
1 stop
IAD15:15Washington, D.C. Dulles Intl
11 Jan
IAD22:30Washington, D.C. Dulles Intl
19h 10m
1 stop
LHR22:40London Heathrow
€587
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 21 November 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

Wed 21/1

06:40-17:15

2 stops15h 35m

Washington, D.C. Dulles Intl

Wed 28/1

20:30-16:25

2 stops14h 55m

€527

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 12/2

06:40-17:15

1 stop15h 35m

Washington, D.C. Dulles Intl

Mon 16/2

20:30-09:20

1 stop31h 50m

€528

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 18/2

07:05-17:15

2 stops15h 10m

Washington, D.C. Dulles Intl

Sat 28/2

20:30-18:30

1 stop17h 00m

€534

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 8/1

07:50-15:35

1 stop12h 45m

Washington, D.C. Dulles Intl

Wed 14/1

17:05-11:25

1 stop13h 20m

€536

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 18/2

07:05-17:15

2 stops15h 10m

Washington, D.C. Dulles Intl

Sat 28/2

20:30-18:50

2 stops17h 20m

€537

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 5/12

12:25-21:00

1 stop13h 35m

Washington, D.C. Dulles Intl

Tue 6/1

17:30-12:40

1 stop14h 10m

€541

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 15/1

06:15-16:30

1 stop15h 15m

Washington, D.C. Dulles Intl

Sat 31/1

18:20-06:30

Nonstop7h 10m

€546

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 20/1

08:25-16:30

1 stop13h 05m

Washington, D.C. Dulles Intl

Mon 26/1

21:45-10:00

Nonstop7h 15m

€548

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Thu 19/2

11:45-22:55

2 stops16h 10m

Baltimore/Washington

Mon 23/2

11:45-06:25

2 stops13h 40m

€562

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Wed 24/12

08:40-23:32

2 stops19h 52m

Baltimore/Washington

Wed 31/12

12:34-09:00

2 stops15h 26m

€572

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 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 cheapest month to fly to Washington, D.C. from London Heathrow Airport is in September. Flight prices, which tend to average around €562, 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 November instead. Flights to Washington, D.C. in November, 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 €671 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 €601 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 November 2025, prices for London Heathrow Airport to Washington, D.C. flights are approximately 42% 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)
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  • 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