Which airport is the most popular for stopovers for flights between Washington, D.C. and London?

Reykjavik (KEF) was the most common stop: 64% of momondo users choosing one-stop flights on this route connected there.

What is the cheapest airline that flies from Washington, D.C. to London?

PLAY and TAP AIR PORTUGAL are the most popular carriers operating from Washington, D.C. to London

Which stopover airport offers the lowest fares from Washington, D.C. to London?

Flights via Dublin (DUB) offer the lowest average return price of £355.

Which stopover airport has the shortest travel time from Washington, D.C. to London?

Flights connecting via Boston (BOS) have the shortest average one-way travel time: 9h 25m.

Which stopover airport has the shortest connection time from Washington, D.C. to London?

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 10m.

Which airlines fly to London?

British Airways, Virgin Atlantic and Iberia are the top three most popular airlines that fly to London from Washington, D.C. according to our data. British Airways is the first choice among our users, with 44% of people opting to fly with this airline when travelling to London. Keep in mind that there are 9 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to London?

Flight times from Washington, D.C. to London vary, but if you’re flying out of Baltimore and flying into London Heathrow Airport (one of the most popular routes), then the duration is 7h 05m on average. Another popular route from Washington, D.C. to London is flying from Washington, D.C. to London Heathrow Airport, which will take roughly 8h 05m. Keep in mind that layovers or delays could extend your travel time.

How many flights depart from Washington, D.C. to London on average per week?

223 flights are operational weekly from Washington, D.C. to London as of August 2025. The most popular departure day for this route is Wed, with 15% of flights per week taking off on this day.

How many flights depart from Washington, D.C. to London on average per day?

31 flights are operational daily from Washington, D.C. to London as of August 2025. The most popular departure time for this route is 22:00, with 76% of flights per day taking off in the evening.

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

Prices for flights from Washington, D.C. to London are refreshed on a daily basis.

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

As of August 2025, there are 9 operators available to choose from for flights from Washington, D.C. to London.

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

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 Washington, D.C. to London.

What documentation or ID do you need to fly to London?

The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

£146 Cheap Flights from Washington, D.C. to London (WAS-LON) in 2025

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Find the cheapest flights from Washington, D.C. to London (WAS-LON)

Round-trip

One-way

Last minute

Direct

Cheap return flights

22:05 - 12:55IAD-LHR

33h 50m2 stops

06:40 - 19:59LHR-IAD

18h 19m1 stop

£282Scandinavian Airlines

Find Deal

Mon, 20 Oct - Thu, 23 Oct

22:20 - 15:35IAD-LGW

12h 15m1 stop

16:25 - 15:20LGW-IAD

27h 55m1 stop

£307TAP AIR PORTUGAL

Find Deal

Mon, 8 Sep - Tue, 23 Sep

18:50 - 10:40BWI-STN

10h 50m1 stop

11:40 - 17:40STN-BWI

11h 00m1 stop

£319PLAY

Find Deal

Tue, 9 Sep - Fri, 19 Sep

18:50 - 10:40BWI-STN

10h 50m1 stop

11:40 - 17:40STN-BWI

11h 00m1 stop

£322PLAY

Find Deal

Wed, 10 Sep - Wed, 17 Sep

12:13 - 10:00IAD-LGW

16h 47m1 stop

12:00 - 19:43LGW-IAD

12h 43m1 stop

£360Virgin Atlantic

Find Deal

Sun, 24 Aug - Tue, 2 Sep

11:00 - 10:00DCA-LGW

18h 00m1 stop

12:00 - 23:41LGW-DCA

16h 41m1 stop

£360Virgin Atlantic

Find Deal

Sun, 24 Aug - Tue, 2 Sep

06:38 - 08:10DCA-LGW

20h 32m1 stop

15:05 - 22:57LGW-DCA

12h 52m1 stop

£364British Airways

Find Deal

Wed, 8 Oct - Tue, 14 Oct

19:25 - 07:45IAD-LHR

7h 20mdirect

14:25 - 17:30LHR-IAD

8h 05mdirect

£364British Airways

Find Deal

Wed, 8 Oct - Wed, 15 Oct

13:39 - 06:20DCA-LHR

11h 41m1 stop

19:10 - 23:07LHR-DCA

32h 57m2 stops

£465Iberia

Find Deal

Sun, 14 Sep - Wed, 1 Oct

14:55 - 21:40DCA-LHR

25h 45m1 stop

17:00 - 22:57LHR-DCA

10h 57m1 stop

£479Iberia

Find Deal

Sat, 11 Oct - Wed, 22 Oct

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

Our best United Airlines deals on Washington, D.C. to London flight tickets

United Airlines

26 Aug

IAD22:20Washington, D.C. Dulles Intl

7h 20m

LHR10:40London Heathrow

16 Sept

LHR12:10London Heathrow

33h 05m

1 stop

IAD16:15Washington, D.C. Dulles Intl

£367

Find similar

United Airlines

6 Oct

BWI06:29Baltimore/Washington

20h 51m

1 stop

LHR08:20London Heathrow

14 Oct

LHR15:50London Heathrow

30h 36m

2 stops

BWI17:26Baltimore/Washington

£378

Find similar

United Airlines

10 Sept

BWI10:51Baltimore/Washington

19h 54m

1 stop

LHR11:45London Heathrow

17 Sept

LHR08:40London Heathrow

30h 15m

2 stops

BWI09:55Baltimore/Washington

£393

Find similar

Delta flights from Washington, D.C. to London

Our best Delta deals on Washington, D.C. to London flight tickets

Delta

19 Aug

IAD12:13Washington, D.C. Dulles Intl

16h 47m

1 stop

LGW10:00London Gatwick

26 Aug

LGW12:00London Gatwick

12h 43m

1 stop

IAD19:43Washington, D.C. Dulles Intl

£360

Find similar

Delta

19 Aug

IAD17:50Washington, D.C. Dulles Intl

7h 30m

LHR06:20London Heathrow

26 Aug

LHR06:15London Heathrow

15h 05m

1 stop

IAD16:20Washington, D.C. Dulles Intl

£375

Find similar

Delta

20 Aug

IAD17:50Washington, D.C. Dulles Intl

7h 30m

LHR06:20London Heathrow

26 Aug

LHR06:30London Heathrow

14h 05m

1 stop

IAD15:35Washington, D.C. Dulles Intl

£375

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 20/10

22:05-12:55

2 stops33h 50m

London Heathrow

Thu 23/10

06:40-19:59

1 stop18h 19m

£282

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Mon 8/9

22:20-15:35

1 stop12h 15m

London Gatwick

Tue 23/9

16:25-15:20

1 stop27h 55m

£307

BaltimoreLondon

BWI - STN

BWISTN

Baltimore/Washington

Tue 9/9

18:50-10:40

1 stop10h 50m

London Stansted

Fri 19/9

11:40-17:40

1 stop11h 00m

£319

BaltimoreLondon

BWI - STN

BWISTN

Baltimore/Washington

Wed 10/9

18:50-10:40

1 stop10h 50m

London Stansted

Wed 17/9

11:40-17:40

1 stop11h 00m

£322

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 24/8

12:13-10:00

1 stop16h 47m

London Gatwick

Tue 2/9

12:00-19:43

1 stop12h 43m

£360

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Sun 24/8

11:00-10:00

1 stop18h 00m

London Gatwick

Tue 2/9

12:00-23:41

1 stop16h 41m

£360

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Wed 8/10

06:38-08:10

1 stop20h 32m

London Gatwick

Tue 14/10

15:05-22:57

1 stop12h 52m

£364

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 8/10

19:25-07:45

Nonstop7h 20m

London Heathrow

Wed 15/10

14:25-17:30

Nonstop8h 05m

£364

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 14/9

13:39-06:20

1 stop11h 41m

London Heathrow

Wed 1/10

19:10-23:07

2 stops32h 57m

£465

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sat 11/10

14:55-21:40

1 stop25h 45m

London Heathrow

Wed 22/10

17:00-22:57

1 stop10h 57m

£479

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. to London

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

Prices

Airlines

Stopovers

Other information

What is the typical price of a round-trip flight between Washington, D.C. and London?

What is the cheapest month to fly to London?

The cheapest month to fly to London from Washington, D.C. is in January. Flight prices, which tend to average around £475, are often lower during this time because this is during the off-season. The month of September is another great option to travel to London, with average flight prices from Washington, D.C. averaging around £480.

What is the cheapest day to depart on your flight to London?

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £529. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. to London for around £620.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £561. Flights at midday are often more expensive, with an average ticket price of £1,411.

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

Fly from Washington, D.C. Dulles Intl to London Heathrow for the best Washington, D.C. - London flight prices

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £556 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Washington, D.C. for as low as £511 on momondo.

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

There are 4 cabin classes available to choose from on Washington, D.C. to London 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 Washington, D.C. to London flights?

You could potentially save up to 53% on your flight if you consider stops on a Washington, D.C. to London flight.

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

As of August 2025, prices for Washington, D.C. to London flights are approximately 18% more expensive when compared to flights at the same time last year.

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

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

Estimated return price

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

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

Best price found	£146
Fastest flight time	7h 10m
Direct flights	Every day
Airports in London	5 airports

The best one-way flight to London from Washington, D.C. in the past 72 hours is £146. The best return flight deal from Washington, D.C. to London found on momondo in the last 72 hours is £282.

The fastest flight from Washington, D.C. to London takes 7h 10m

Direct flights go from Washington, D.C. to London every day.

There are 5 airports near London: London City (LCY), London Heathrow (LHR), London Luton (LTN), London Stansted (STN), London Gatwick (LGW)

Search flight deals

How far is Washington, D.C. to London by plane?
There are 3662.3 mi between Washington, D.C. and London. 7h 20m is a normal flight duration for this route.
When did momondo last update prices for flights from Washington, D.C. to London?
Prices for flights from Washington, D.C. to London are refreshed on a daily basis.
How many operators does momondo search for flights from Washington, D.C. to London?
As of August 2025, there are 9 operators available to choose from for flights from Washington, D.C. to London.
How old do you have to be to fly from Washington, D.C. to London?
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 Washington, D.C. to London.
What documentation or ID do you need to fly to London?
The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Washington, D.C. to London?
Based on momondo bookings for flights between Washington, D.C. and London, the leading plane model is Boeing 777, making up 37.18% of the total bookings. Other popular models include Airbus A380-800 with 15.77%, Boeing 787-8 Dreamliner with 9.47%, and Boeing 777-300ER with 6.08%.
What is the most popular airline from Washington, D.C. to London?
momondo data reveals that the most frequently booked airline on the route from Washington, D.C. to London is British Airways, representing 24% of all bookings. The subsequent popular airlines are Iberia at 15%, Virgin Atlantic at 14%, and PLAY at 10%.

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

Compare and see reviews for airlines that fly from Washington, D.C. to London with momondo

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom £306	Free Cancellation	Rating 6.8 7,321 reviews	Search Lufthansa flights
Icelandair	PriceFrom £353	Free Cancellation	Rating 7.0 526 reviews	Search Icelandair flights
Virgin Atlantic	PriceFrom £374	Free Cancellation	Rating 7.4 657 reviews	Search Virgin Atlantic flights
Air France	PriceFrom £393	Free Cancellation	Rating 7.4 1,468 reviews	Search Air France flights
British Airways	PriceFrom £403	Free Cancellation	Rating 6.6 7,267 reviews	Search British Airways flights
Iberia	PriceFrom £410	Free Cancellation	Rating 7.0 2,882 reviews	Search Iberia flights
KLM	PriceFrom £455	Free Cancellation	Rating 7.8 1,384 reviews	Search KLM flights
United Airlines	PriceFrom £482	Free Cancellation	Rating 7.4 8,915 reviews	Search United Airlines flights
American Airlines	PriceFrom £489	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights

KLM Flights From Washington, D.C. to London
KLM flight deals from Washington, D.C. to London start from £616 round-trip. Over the 6 KLM flights for this route in a normal week, average airfare is usually £739 round-trip - but some users have found much cheaper deals with momondo.
Virgin Atlantic Flights From Washington, D.C. to London
Virgin Atlantic (7.4/10 from 657 reviews) operates around 6 flights from Washington, D.C. to London in any given week. The average Virgin Atlantic airfare for this route is around £821, with deals from around £507 rare but found on momondo. Referenced prices are for round-trip Washington, D.C. to London flight searches in the last 72 hours.

Eastbourne

Milton Keynes

Luton

Slough

Maidstone

Gatwick

Southend-on-Sea

Canterbury

Ipswich

Ilford

Guildford

Colchester

Worthing

Hounslow

Dartford

Dover

Chelmsford

Hayes

Bedford

Winchester

Why use momondo?

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

Finding the right flight to London from Washington, D.C. 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 London quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to London from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to London from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Washington, D.C. to London right now. Can momondo alert me if prices change?

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

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Flights to Newquayfrom £34

Cheap flights from Washington, D.C. to London from £146

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to London departing on 6/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

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Find the cheapest flights from Washington, D.C. to London (WAS-LON)

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

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

Our best United Airlines deals on Washington, D.C. to London flight tickets

Delta flights from Washington, D.C. to London

Our best Delta deals on Washington, D.C. to London flight tickets

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Use the filters below to find and compare flights from Washington, D.C. to London that are best for you.

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How to get the cheapest flight ticket from Washington, D.C. to London

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 Washington, D.C. and London?

What is the cheapest month to fly to London?

What is the cheapest day to depart on your flight to London?

Our data shows that Wednesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £529. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. to London for around £620.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £561. Flights at midday are often more expensive, with an average ticket price of £1,411.

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

Fly from Washington, D.C. Dulles Intl to London Heathrow for the best Washington, D.C. - London flight prices

How far in advance should I book a flight to London?

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

There are 4 cabin classes available to choose from on Washington, D.C. to London 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 Washington, D.C. to London flights?

You could potentially save up to 53% on your flight if you consider stops on a Washington, D.C. to London flight.

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

As of August 2025, prices for Washington, D.C. to London flights are approximately 18% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from Washington, D.C. to London?

PLAY and TAP AIR PORTUGAL are the most popular carriers operating from Washington, D.C. to London

Which airlines fly to London?

Which airport is the most popular for stopovers for flights between Washington, D.C. and London?

Reykjavik (KEF) was the most common stop: 64% of momondo users choosing one-stop flights on this route connected there.

Which stopover airport offers the lowest fares from Washington, D.C. to London?

Flights via Dublin (DUB) offer the lowest average return price of £355.

Which stopover airport has the shortest travel time from Washington, D.C. to London?

Flights connecting via Boston (BOS) have the shortest average one-way travel time: 9h 25m.

Which stopover airport has the shortest connection time from Washington, D.C. to London?

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 10m.

How many flights depart from Washington, D.C. to London on average per day?

31 flights are operational daily from Washington, D.C. to London as of August 2025. The most popular departure time for this route is 22:00, with 76% of flights per day taking off in the evening.

How many flights depart from Washington, D.C. to London on average per week?

223 flights are operational weekly from Washington, D.C. to London as of August 2025. The most popular departure day for this route is Wed, with 15% of flights per week taking off on this day.

How long does it take to fly to London?

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

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

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

Best price found

Fastest flight time

Direct flights

Airports in London

How far is Washington, D.C. to London by plane?

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

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

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

What documentation or ID do you need to fly to London?

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

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

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

Compare and see reviews for airlines that fly from Washington, D.C. to London with momondo

KLM Flights From Washington, D.C. to London

Virgin Atlantic Flights From Washington, D.C. to London

Travelling to a place near London?

Why use momondo?

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

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

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

I’m not ready to book a flight from Washington, D.C. to London right now. Can momondo alert me if prices change?

An easier way to manage your London trip