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Cheap flights from London to Washington, D.C. from £180

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 28/8. 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

PLAY Logo
11:40 - 17:40STN-BWI
11h 00m1 stop
PLAY Logo
18:50 - 10:40BWI-STN
10h 50m1 stop
£310PLAY
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Wed, 17 Sep - Wed, 1 Oct
PLAY Logo
11:40 - 17:40STN-BWI
11h 00m1 stop
PLAY Logo
18:50 - 10:40BWI-STN
10h 50m1 stop
£316PLAY
Find Deal
Fri, 5 Sep - Sun, 21 Sep
Icelandair Logo
11:55 - 18:20LGW-IAD
11h 25m1 stop
Icelandair Logo
19:40 - 10:55IAD-LGW
10h 15m1 stop
£363Icelandair
Find Deal
Thu, 6 Nov - Mon, 10 Nov
Icelandair Logo
12:15 - 18:20LHR-IAD
11h 05m1 stop
Icelandair Logo
19:40 - 19:30IAD-LHR
18h 50m1 stop
£365Icelandair
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Thu, 6 Nov - Mon, 8 Dec
Lufthansa Logo
07:25 - 15:05LHR-IAD
12h 40m1 stop
Lufthansa Logo
22:32 - 20:40IAD-LHR
17h 08m1 stop
£370Lufthansa
Find Deal
Sat, 13 Sep - Sat, 13 Sep
Lufthansa Logo
10:50 - 19:25LHR-IAD
13h 35m1 stop
Lufthansa Logo
22:32 - 20:40IAD-LHR
17h 08m1 stop
£393Lufthansa
Find Deal
Sat, 13 Sep - Sat, 13 Sep
British Airways Logo
15:05 - 23:07LGW-DCA
13h 02m1 stop
British Airways Logo
13:39 - 07:50DCA-LGW
13h 11m1 stop
£458British Airways
Find Deal
Thu, 11 Sep - Sun, 14 Sep
British Airways Logo
15:05 - 23:07LGW-DCA
13h 02m1 stop
British Airways Logo
06:45 - 07:50DCA-LGW
20h 05m1 stop
£459British Airways
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Mon, 15 Sep - Sun, 21 Sep
Virgin Atlantic Logo
09:20 - 15:35LCY-IAD
11h 15m1 stop
Virgin Atlantic Logo
17:25 - 09:30IAD-LCY
11h 05m1 stop
£505Virgin Atlantic
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Fri, 12 Sep - Fri, 19 Sep
Virgin Atlantic Logo
07:45 - 15:35LCY-IAD
12h 50m1 stop
Virgin Atlantic Logo
12:08 - 09:30IAD-LCY
16h 22m2 stops
£515Virgin Atlantic
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Wed, 10 Sep - Wed, 1 Oct

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

Our best Austrian Airlines deals on London to Washington, D.C. flight tickets
Austrian Airlines
18 Jan
LHR06:00London Heathrow
13h 40m
1 stop
IAD14:40Washington, D.C. Dulles Intl
25 Jan
IAD18:20Washington, D.C. Dulles Intl
7h 20m
LHR06:40London Heathrow
£403
Find similar
Austrian Airlines
8 Aug
LHR16:40London Heathrow
8h 20m
IAD20:00Washington, D.C. Dulles Intl
20 Sept
IAD17:15Washington, D.C. Dulles Intl
13h 30m
1 stop
LHR11:45London Heathrow
£540
Find similar
Austrian Airlines
8 Aug
LHR16:40London Heathrow
8h 20m
IAD20:00Washington, D.C. Dulles Intl
14 Aug
IAD17:13Washington, D.C. Dulles Intl
13h 32m
1 stop
LHR11:45London Heathrow
£553
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SWISS flights from London to Washington, D.C.

Our best SWISS deals on London to Washington, D.C. flight tickets
SWISS
11 Sept
LGW18:40London Gatwick
26h 35m
1 stop
IAD16:15Washington, D.C. Dulles Intl
18 Sept
IAD20:45Washington, D.C. Dulles Intl
16h 05m
1 stop
LGW17:50London Gatwick
£435
Find similar
SWISS
17 Sept
LCY09:25London City
11h 50m
1 stop
IAD16:15Washington, D.C. Dulles Intl
24 Sept
IAD20:45Washington, D.C. Dulles Intl
10h 45m
1 stop
LCY12:30London City
£454
Find similar
SWISS
7 Aug
LHR18:40London Heathrow
26h 35m
1 stop
IAD16:15Washington, D.C. Dulles Intl
12 Aug
IAD20:45Washington, D.C. Dulles Intl
16h 05m
1 stop
LHR17:50London Heathrow
£551
Find similar

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 279,928 searches. Data last updated 30 July 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

LondonBaltimore

STN - BWI

STNBWI

London Stansted

Wed 17/9

11:40-17:40

1 stop11h 00m

Baltimore/Washington

Wed 1/10

18:50-10:40

1 stop10h 50m

£310

LondonBaltimore

STN - BWI

STNBWI

London Stansted

Fri 5/9

11:40-17:40

1 stop11h 00m

Baltimore/Washington

Sun 21/9

18:50-10:40

1 stop10h 50m

£316

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 6/11

11:55-18:20

1 stop11h 25m

Washington, D.C. Dulles Intl

Mon 10/11

19:40-10:55

1 stop10h 15m

£363

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 6/11

12:15-18:20

1 stop11h 05m

Washington, D.C. Dulles Intl

Mon 8/12

19:40-19:30

1 stop18h 50m

£365

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 13/9

07:25-15:05

1 stop12h 40m

Washington, D.C. Dulles Intl

Sat 13/9

22:32-20:40

1 stop17h 08m

£370

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 13/9

10:50-19:25

1 stop13h 35m

Washington, D.C. Dulles Intl

Sat 13/9

22:32-20:40

1 stop17h 08m

£393

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Thu 11/9

15:05-23:07

1 stop13h 02m

Washington, D.C. Reagan-National

Sun 14/9

13:39-07:50

1 stop13h 11m

£458

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Mon 15/9

15:05-23:07

1 stop13h 02m

Washington, D.C. Reagan-National

Sun 21/9

06:45-07:50

1 stop20h 05m

£459

LondonWashington, D.C.

LCY - IAD

LCYIAD

London City

Fri 12/9

09:20-15:35

1 stop11h 15m

Washington, D.C. Dulles Intl

Fri 19/9

17:25-09:30

1 stop11h 05m

£505

LondonWashington, D.C.

LCY - IAD

LCYIAD

London City

Wed 10/9

07:45-15:35

1 stop12h 50m

Washington, D.C. Dulles Intl

Wed 1/10

12:08-09:30

2 stops16h 22m

£515

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 £467, are often lower during this time because this is during the off-season. If you don’t want to visit Washington, D.C. in February, then you should wait until November to fly from London, when ticket prices are also cheap, with an average price of £495.

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 is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £614. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from London because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £689.

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 to Washington, D.C. when you can find flight prices for as low as £514. Flying to Washington, D.C. in the evening is an ideal time because this is during off-peak travel hours. Flights to Washington, D.C. are more costly in the afternoon, with an average ticket price of £643. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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 £646 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 £541 on momondo.

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

There are 4 cabin classes 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?

You could potentially save up to 26% on your flight if you consider stops on a London to Washington, D.C. flight.

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

As of July 2025, prices for London to Washington, D.C. flights are approximately 44% 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.

Best price found

£180

Fastest flight time

8h 15m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sat

Airports in Washington, D.C.

3 airports
The best one-way flight to Washington, D.C. from London in the past 72 hours is £180. The best return flight deal from London to Washington, D.C. found on momondo in the last 72 hours is £310.
The fastest flight from London to Washington, D.C. takes 8h 15m
Direct flights go from London to Washington, D.C. on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. Airlines offering direct flights are: Finnair, Aer Lingus and Iberia.
There are 3 airports near Washington, D.C.: Washington, D.C. Reagan-National (DCA), Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD)
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  • How far is London to Washington, D.C. by plane?

    The distance between London and Washington, D.C. is about 3662.3 mi. 8h 15m is a normal flight duration for this route.

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

    Prices for flights from London to Washington, D.C. were last updated today.

  • How many operators does momondo search for flights from London to Washington, D.C.?

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for 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 license 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.?

  • What is the most popular airline from London to Washington, D.C.?

Best airlines flying from London to Washington, D.C.

Compare and see reviews for airlines that fly from London to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom £190Free CancellationRating
8.0
7,977 reviews
Search Delta flights
PLAYPriceFrom £250Free CancellationRating
7.0
102 reviews
Search PLAY flights
Air FrancePriceFrom £295Free CancellationRating
7.5
1,465 reviews
Search Air France flights
IcelandairPriceFrom £349Free CancellationRating
7.0
521 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom £355Free CancellationRating
7.1
1,929 reviews
Search TAP AIR PORTUGAL flights
JetBluePriceFrom £377Free CancellationRating
7.2
2,913 reviews
Search JetBlue flights
FinnairPriceFrom £441Free CancellationRating
7.6
1,316 reviews
Search Finnair flights
Scandinavian AirlinesPriceFrom £441Free CancellationRating
7.3
1,449 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom £445Free CancellationRating
6.8
7,265 reviews
Search Lufthansa flights
United AirlinesPriceFrom £449Free CancellationRating
7.4
8,899 reviews
Search United Airlines flights

  • Delta Flights From London to Washington, D.C.

    Delta flight deals from London to Washington, D.C. start from £253 round-trip. Over the 3 Delta flights for this route in a normal week, average airfare is usually £717 round-trip - but some users have found much cheaper deals with momondo.

  • KLM Flights From London to Washington, D.C.

    KLM (7.8/10 from 1,383 reviews) operates around 3 flights from London to Washington, D.C. in any given week. The average KLM airfare for this route is around £858, with deals from around £617 rare but found on momondo. Referenced prices are for round-trip London to Washington, D.C. flight searches in the last 72 hours.

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Laurel
Essex
Alexandria
Fairfax
Manassas
Bethesda
Oxon Hill
College Park
Linthicum Heights
Gettysburg
Hanover
Cambridge
Ellicott City
Westminster
Arlington
Woodbridge
Owings Mills
Silver Spring
National Harbor

Why use momondo?

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

Finding the right flight to Washington, D.C. from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

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

All flight searches from London to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from London to Washington, D.C.?

Once you have performed a search for London to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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 can track prices for London to Washington, D.C. flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport