What airlines fly to London?

British Airways, Iberia and United Airlines 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 52% of people opting to fly with this airline when traveling to London. Keep in mind that there are 17 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

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

Amsterdam (AMS) has the shortest average layover time for this route: 0h 55m.

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

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

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

Flights connecting via New York (JFK) have the shortest average one-way travel time: 9h 07m.

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

As of October 2025, there are 206 flights per week flying from Washington, D.C. to London. The most common day of the week flights depart is Wed, with 16% of flights taking off on this day.

How long does it take to fly to London?

If you’re flying from a popular airport in Washington, D.C., such as Baltimore or Washington, D.C., and flying into London, then you can expect flight times to average 7h 05m and 8h 15m, respectively.

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

Flights via Lisbon (LIS) offer the lowest average round-trip price of $445.

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

Reykjavik (KEF) was the most common stop: 56% of momondo users choosing 1-stop flights on this route connected there.

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

29 flights are operational daily from Washington, D.C. to London as of October 2025. The most popular departure time for this route is 10:00PM, 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 were last updated today.

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

As of October 2025, there are 17 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?

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 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.

$176 Cheap Flights from Washington, D.C. to London in 2025/26

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

Prices are currently low for flights on this route. Typical prices usually range from $592 to $783. The lowest price recently found on this route was $553.

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Cheap round-trip flights

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12:30 pm - 4:00 pmIAD-LHR

22h 30m2 stops

6:40 pm - 6:50 pmLHR-IAD

29h 10m1 stop

$553Scandinavian Airlines

Find Deal

Sun, Jan 18 - Fri, Jan 23

12:11 pm - 4:00 pmIAD-LHR

22h 49m2 stops

6:40 pm - 5:15 pmLHR-IAD

27h 35m1 stop

$555Scandinavian Airlines

Find Deal

Fri, Nov 14 - Tue, Nov 18

7:40 pm - 10:55 amIAD-LGW

10h 15m1 stop

11:55 am - 6:30 pmLGW-IAD

11h 35m1 stop

$560Icelandair

Find Deal

Thu, Nov 13 - Sat, Nov 22

7:40 pm - 7:30 pmIAD-LHR

18h 50m1 stop

8:35 pm - 6:30 pmLHR-IAD

26h 55m1 stop

$560Icelandair

Find Deal

Sun, Dec 7 - Mon, Dec 22

11:45 am - 7:30 amDCA-LGW

14h 45m1 stop

11:20 am - 11:07 pmLGW-DCA

16h 47m1 stop

$572British Airways

Find Deal

Tue, Dec 2 - Wed, Dec 10

8:35 pm - 8:40 amBWI-LHR

7h 05mnonstop

3:25 pm - 6:45 pmLHR-BWI

8h 20mnonstop

$579British Airways

Find Deal

Wed, Nov 26 - Wed, Dec 3

8:35 pm - 8:40 amBWI-LHR

7h 05mnonstop

3:25 pm - 6:45 pmLHR-BWI

8h 20mnonstop

$587Iberia

Find Deal

Wed, Feb 11 - Tue, Feb 17

6:20 pm - 6:30 amIAD-LHR

7h 10mnonstop

12:10 pm - 3:35 pmLHR-IAD

8h 25mnonstop

$587Iberia

Find Deal

Wed, Jan 28 - Tue, Feb 3

10:56 am - 7:55 amBWI-LHR

15h 59m1 stop

11:10 am - 9:59 amLHR-BWI

27h 49m2 stops

$619United Airlines

Find Deal

Wed, Nov 12 - Wed, Nov 19

8:40 pm - 6:30 amDCA-LHR

28h 50m1 stop

11:05 am - 4:22 pmLHR-DCA

34h 17m2 stops

$636United Airlines

Find Deal

Sat, Nov 22 - Tue, Dec 2

SWISS flights from Washington, D.C. to London

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

SWISS

Nov 2

IAD8:30 pmWashington, D.C. Dulles Intl

14h 50m

1 stop

LHR4:20 pmLondon Heathrow

Nov 11

LHR6:00 amLondon Heathrow

15h 40m

1 stop

IAD4:40 pmWashington, D.C. Dulles Intl

$575

Find similar

SWISS

Dec 29

IAD8:30 pmWashington, D.C. Dulles Intl

15h 35m

1 stop

LCY5:05 pmLondon City

Jan 7

LCY5:45 pmLondon City

27h 55m

1 stop

IAD4:40 pmWashington, D.C. Dulles Intl

$577

Find similar

SWISS

Oct 22

IAD8:45 pmWashington, D.C. Dulles Intl

16h 10m

1 stop

LGW5:55 pmLondon Gatwick

Oct 29

LGW6:40 pmLondon Gatwick

27h 00m

1 stop

IAD5:40 pmWashington, D.C. Dulles Intl

$591

Find similar

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

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

United Airlines

Oct 26

IAD11:15 pmWashington, D.C. Dulles Intl

7h 35m

LHR10:50 amLondon Heathrow

Nov 3

LHR1:45 pmLondon Heathrow

31h 55m

1 stop

IAD4:40 pmWashington, D.C. Dulles Intl

$605

Find similar

United Airlines

Oct 22

IAD8:30 amWashington, D.C. Dulles Intl

17h 00m

2 stops

LHR6:30 amLondon Heathrow

Nov 18

LHR6:50 amLondon Heathrow

12h 45m

1 stop

IAD2:35 pmWashington, D.C. Dulles Intl

$610

Find similar

United Airlines

Nov 12

BWI10:56 amBaltimore/Washington

15h 59m

1 stop

LHR7:55 amLondon Heathrow

Nov 19

LHR11:10 amLondon Heathrow

27h 49m

2 stops

BWI9:59 amBaltimore/Washington

$619

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 1/18

12:30 pm-4:00 pm

2 stops22h 30m

London Heathrow

Fri 1/23

6:40 pm-6:50 pm

1 stop29h 10m

$553

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Fri 11/14

12:11 pm-4:00 pm

2 stops22h 49m

London Heathrow

Tue 11/18

6:40 pm-5:15 pm

1 stop27h 35m

$555

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 11/13

7:40 pm-10:55 am

1 stop10h 15m

London Gatwick

Sat 11/22

11:55 am-6:30 pm

1 stop11h 35m

$560

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sun 12/7

7:40 pm-7:30 pm

1 stop18h 50m

London Heathrow

Mon 12/22

8:35 pm-6:30 pm

1 stop26h 55m

$560

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Tue 12/2

11:45 am-7:30 am

1 stop14h 45m

London Gatwick

Wed 12/10

11:20 am-11:07 pm

1 stop16h 47m

$572

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Wed 11/26

8:35 pm-8:40 am

Nonstop7h 05m

London Heathrow

Wed 12/3

3:25 pm-6:45 pm

Nonstop8h 20m

$579

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Wed 2/11

8:35 pm-8:40 am

Nonstop7h 05m

London Heathrow

Tue 2/17

3:25 pm-6:45 pm

Nonstop8h 20m

$587

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Wed 1/28

6:20 pm-6:30 am

Nonstop7h 10m

London Heathrow

Tue 2/3

12:10 pm-3:35 pm

Nonstop8h 25m

$587

BaltimoreLondon

BWI - LHR

BWILHR

Baltimore/Washington

Wed 11/12

10:56 am-7:55 am

1 stop15h 59m

London Heathrow

Wed 11/19

11:10 am-9:59 am

2 stops27h 49m

$619

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sat 11/22

8:40 pm-6:30 am

1 stop28h 50m

London Heathrow

Tue 12/2

11:05 am-4:22 pm

2 stops34h 17m

$636

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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

Prices

Airlines

Layovers

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 September. Flight prices, which tend to average around $630, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Washington, D.C. averaging around $656.

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

The cheapest day to depart from Washington, D.C. to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $765. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $905. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

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

Flying to London from Washington, D.C. in the evening is the least expensive time of day to depart. momondo users have found prices as low as $815 when looking at flights departing in the evening. Flights to London are more costly in the afternoon, with an average ticket price of $823. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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 $759 when searching weeks out. 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 $705 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 39% 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 October 2025, prices for Washington, D.C. to London flights are approximately 148% 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 round-trip 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	$384
Fastest flight time	7h 05m
Direct flights	Mon, Wed, Thu, Fri, Sat and Sun
Airports in London	1 airport

The best one-way flight to London from Washington, D.C. in the past 72 hours is $384. The best round-trip flight deal from Washington, D.C. to London found on momondo in the last 72 hours is $678.

The fastest flight from Washington, D.C. to London takes 7h 05m

Direct flights go from Washington, D.C. to London on Monday, Wednesday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.

There is 1 airport near London: London Heathrow (LHR)

Search flight deals

How far is Washington, D.C. to London by plane?
Washington, D.C. and London are 3662.3 mi apart from one another. A reasonable flight in good conditions will take 7h 05m.
When did momondo last update prices for flights from Washington, D.C. to London?
Prices for flights from Washington, D.C. to London were last updated today.
How many operators does momondo search for flights from Washington, D.C. to London?
As of October 2025, there are 17 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?
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 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 this flight route, the most popular plane model on flight routes from Washington, D.C. to London is Boeing 777 (41.33% of total bookings). The next most popular plane models are Airbus A380-800 (10.01%), Boeing 787-8 Dreamliner (10.01%), and Airbus A350-1000 (8.31%).
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 28% of all bookings. The subsequent popular airlines are Iberia at 14%, United Airlines at 14%, and Icelandair at 9%.

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
JetBlue	PriceFrom $31	Free Cancellation	Rating 7.2 2,907 reviews	Search JetBlue flights
PLAY	PriceFrom $369	Free Cancellation	Rating 7.0 103 reviews	Search PLAY flights
TAP AIR PORTUGAL	PriceFrom $395	Free Cancellation	Rating 7.1 2,016 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $397	Free Cancellation	Rating 6.8 7,497 reviews	Search Lufthansa flights
Scandinavian Airlines	PriceFrom $424	Free Cancellation	Rating 7.4 1,533 reviews	Search Scandinavian Airlines flights
Icelandair	PriceFrom $433	Free Cancellation	Rating 7.0 556 reviews	Search Icelandair flights
Virgin Atlantic	PriceFrom $497	Free Cancellation	Rating 7.5 670 reviews	Search Virgin Atlantic flights
American Airlines	PriceFrom $497	Free Cancellation	Rating 7.2 11,040 reviews	Search American Airlines flights
United Airlines	PriceFrom $506	Free Cancellation	Rating 7.4 8,982 reviews	Search United Airlines flights
KLM	PriceFrom $520	Free Cancellation	Rating 7.7 1,404 reviews	Search KLM flights

Delta Flights From Washington, D.C. to London
The lowest priced Delta flight from Washington, D.C. to London from the last 72 hours was $558. Generally, Delta has 4 flights on this route every week with an average price of $821. Delta is rated 7.9/10 by our users.
KLM Flights From Washington, D.C. to London
KLM (7.7/10 from 1,404 reviews) operates around 4 flights from Washington, D.C. to London in any given week. The average KLM airfare for this route is around $654, with deals from around $520 rare but found on momondo. Referenced prices are for round-trip Washington, D.C. to London flight searches in the last 72 hours.

Gatwick

Hounslow

Milton Keynes

Luton

Dover

Slough

Guildford

Dartford

Crawley

Hayes

Brentwood

Chelmsford

Colchester

Folkestone

Romford

Ilford

Cobham

Wembley

Stansted

Watford

Why use momondo?

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

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 London from Washington, D.C..

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 helps you find the best flight between Washington, D.C. and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to London from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Cheap flights from Washington, D.C. to London from $176

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 10/21. 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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SWISS flights from Washington, D.C. to London

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

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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?

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

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 39% 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 October 2025, prices for Washington, D.C. to London flights are approximately 148% 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?

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

What airlines fly to London?

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

Reykjavik (KEF) was the most common stop: 56% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Lisbon (LIS) offer the lowest average round-trip price of $445.

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

Flights connecting via New York (JFK) have the shortest average one-way travel time: 9h 07m.

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

Amsterdam (AMS) has the shortest average layover time for this route: 0h 55m.

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

29 flights are operational daily from Washington, D.C. to London as of October 2025. The most popular departure time for this route is 10:00PM, 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?

As of October 2025, there are 206 flights per week flying from Washington, D.C. to London. The most common day of the week flights depart is Wed, with 16% of flights taking off on this day.

How long does it take to fly to London?

If you’re flying from a popular airport in Washington, D.C., such as Baltimore or Washington, D.C., and flying into London, then you can expect flight times to average 7h 05m and 8h 15m, respectively.

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

Delta Flights From Washington, D.C. to London

KLM Flights From Washington, D.C. to London

Traveling 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

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