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Cheap flights from London to Washington, D.C. from €472

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 to Washington, D.C. departing on 16/2. 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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0 bags
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Cheap return flights

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United Airlines Logo
18:00 - 11:45LHR-IAD
22h 45m1 stop
United Airlines Logo
22:15 - 10:50IAD-LHR
7h 35mdirect
€506United Airlines
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Sat, 29 Nov - Sun, 30 Nov
United Airlines Logo
13:00 - 15:46LHR-IAD
31h 46m1 stop
United Airlines Logo
20:30 - 16:20IAD-LHR
14h 50m1 stop
€507United Airlines
Find Deal
Sat, 15 Nov - Sun, 16 Nov
Scandinavian Airlines Logo
19:50 - 18:50LHR-IAD
28h 00m2 stops
Scandinavian Airlines Logo
20:30 - 16:25IAD-LHR
14h 55m2 stops
€525Scandinavian Airlines
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Fri, 30 Jan - Mon, 2 Feb
TAP AIR PORTUGAL Logo
06:00 - 14:35LHR-IAD
13h 35m1 stop
TAP AIR PORTUGAL Logo
17:30 - 11:25IAD-LHR
12h 55m1 stop
€531TAP AIR PORTUGAL
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Tue, 2 Dec - Sat, 6 Dec
Scandinavian Airlines Logo
10:20 - 17:15LHR-IAD
11h 55m1 stop
Scandinavian Airlines Logo
20:30 - 08:55IAD-LHR
31h 25m2 stops
€536Scandinavian Airlines
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Thu, 12 Feb - Mon, 23 Feb
United Airlines Logo
12:05 - 16:40LHR-IAD
33h 35m1 stop
United Airlines Logo
12:51 - 07:10IAD-LHR
37h 19m2 stops
€545United Airlines
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Thu, 13 Nov - Sat, 15 Nov
Delta Logo
06:30 - 16:51LHR-BWI
15h 21m2 stops
Delta Logo
18:59 - 11:40BWI-LHR
11h 41m1 stop
€567Delta
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Wed, 17 Dec - Mon, 29 Dec
Delta Logo
08:40 - 20:44LHR-BWI
17h 04m2 stops
Delta Logo
12:19 - 08:05BWI-LHR
14h 46m2 stops
€568Delta
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Tue, 25 Nov - Sun, 7 Dec
KLM Logo
11:15 - 23:02LHR-BWI
15h 47m2 stops
KLM Logo
17:39 - 08:45BWI-LHR
10h 06m1 stop
€570KLM
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Sat, 1 Nov - Wed, 5 Nov
KLM Logo
11:15 - 23:02LHR-BWI
15h 47m2 stops
KLM Logo
17:39 - 08:45BWI-LHR
10h 06m1 stop
€575KLM
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Sat, 1 Nov - Wed, 5 Nov

United Airlines flights from London to Washington, D.C.

Our best United Airlines deals on London to Washington, D.C. flight tickets
United Airlines
29 Nov
LHR18:00London Heathrow
22h 45m
1 stop
IAD11:45Washington, D.C. Dulles Intl
30 Nov
IAD22:15Washington, D.C. Dulles Intl
7h 35m
LHR10:50London Heathrow
€506
Find similar
United Airlines
15 Nov
LHR13:00London Heathrow
31h 46m
1 stop
IAD15:46Washington, D.C. Dulles Intl
16 Nov
IAD20:30Washington, D.C. Dulles Intl
14h 50m
1 stop
LHR16:20London Heathrow
€507
Find similar
United Airlines
13 Nov
LHR12:05London Heathrow
33h 35m
1 stop
IAD16:40Washington, D.C. Dulles Intl
15 Nov
IAD12:51Washington, D.C. Dulles Intl
37h 19m
2 stops
LHR07:10London Heathrow
€545
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Scandinavian Airlines flights from London to Washington, D.C.

Our best Scandinavian Airlines deals on London to Washington, D.C. flight tickets
Scandinavian Airlines
30 Jan
LHR19:50London Heathrow
28h 00m
2 stops
IAD18:50Washington, D.C. Dulles Intl
2 Feb
IAD20:30Washington, D.C. Dulles Intl
14h 55m
2 stops
LHR16:25London Heathrow
€525
Find similar
Scandinavian Airlines
12 Feb
LHR10:20London Heathrow
11h 55m
1 stop
IAD17:15Washington, D.C. Dulles Intl
23 Feb
IAD20:30Washington, D.C. Dulles Intl
31h 25m
2 stops
LHR08:55London Heathrow
€536
Find similar
Scandinavian Airlines
25 Jan
LHR19:50London Heathrow
24h 30m
2 stops
IAD15:20Washington, D.C. Dulles Intl
18 Feb
IAD20:30Washington, D.C. Dulles Intl
14h 55m
2 stops
LHR16:25London Heathrow
€555
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momondo Fare Finder

 
Customise your flight search to find flights from London 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 18 October 2025.
Use the filters below to find and compare flights from London 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

Sat 29/11

18:00-11:45

1 stop22h 45m

Washington, D.C. Dulles Intl

Sun 30/11

22:15-10:50

Nonstop7h 35m

€506

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 15/11

13:00-15:46

1 stop31h 46m

Washington, D.C. Dulles Intl

Sun 16/11

20:30-16:20

1 stop14h 50m

€507

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 30/1

19:50-18:50

2 stops28h 00m

Washington, D.C. Dulles Intl

Mon 2/2

20:30-16:25

2 stops14h 55m

€525

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 2/12

06:00-14:35

1 stop13h 35m

Washington, D.C. Dulles Intl

Sat 6/12

17:30-11:25

1 stop12h 55m

€531

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 12/2

10:20-17:15

1 stop11h 55m

Washington, D.C. Dulles Intl

Mon 23/2

20:30-08:55

2 stops31h 25m

€536

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 13/11

12:05-16:40

1 stop33h 35m

Washington, D.C. Dulles Intl

Sat 15/11

12:51-07:10

2 stops37h 19m

€545

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Wed 17/12

06:30-16:51

2 stops15h 21m

Baltimore/Washington

Mon 29/12

18:59-11:40

1 stop11h 41m

€567

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Tue 25/11

08:40-20:44

2 stops17h 04m

Baltimore/Washington

Sun 7/12

12:19-08:05

2 stops14h 46m

€568

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Sat 1/11

11:15-23:02

2 stops15h 47m

Baltimore/Washington

Wed 5/11

17:39-08:45

1 stop10h 06m

€570

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Sat 1/11

11:15-23:02

2 stops15h 47m

Baltimore/Washington

Wed 5/11

17:39-08:45

1 stop10h 06m

€575

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 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 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 is in February. Flight prices, which tend to average around €531, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Washington, D.C. from London during September instead. Flights to Washington, D.C. in September, while not as cheap as those in February, still average around €547.

What is the cheapest London to Washington, D.C. flight route?

Fly from London Heathrow to Washington, D.C. Dulles Intl for the best London - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around €668 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 for as low as €631 on momondo.

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

There is only 1 cabin class available to choose from on London 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 to Washington, D.C. flights?

No. A direct flight is the cheapest option for a flight between London to Washington, D.C..

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

As of October 2025, prices for London to Washington, D.C. flights are approximately 134% more expensive when compared to flights at the same time last year.

When to book flights from London to Washington, D.C.

Are you open to changing your travel dates? Check out the ideal times to fly from London to Washington, D.C. according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London to Washington, D.C. (LON to WAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Washington, D.C.

Fastest flight time

8h 00m

Direct flights

Every day

Airports in Washington, D.C.

2 airports
The fastest flight from London to Washington, D.C. takes 8h 00m
Direct flights go from London 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 to Washington, D.C. by plane?

    A flight from London to Washington, D.C. will travel around 5893.9 km. By plane, this route typically takes 8h 40m.

  • When did momondo last update prices for flights from London to Washington, D.C.?

    Prices for flights from London to Washington, D.C. refresh daily.

  • How old do you have to be to fly from London to Washington, D.C.?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The required travel and health documents for your Washington, D.C. trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from London 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.?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from London.

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?

If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from London and alert you when they change.

An easier way to manage your Washington, D.C. trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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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