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

WorldTicket and PLAY 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 August 2025, there are 204 flights per week flying from Washington, D.C. to London. The most common day of the week flights depart is Mon, with 16% of flights taking off on this day.

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.

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

Reykjavik (KEF) was the most common stop: 64% 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 Reykjavik (KEF) offer the lowest average round-trip price of $388.

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 07m, respectively.

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 51% 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.

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 August 2025. The most popular departure time for this route is 10:00PM, with 75% 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 August 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.

$188 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 round-trip flights

8:30 pm - 6:30 pmIAD-LHR

17h 00m1 stop

6:40 pm - 3:20 pmLHR-IAD

25h 40m1 stop

$493Scandinavian Airlines

Find Deal

Mon, Jan 12 - Sun, Jan 25

7:40 pm - 11:00 pmIAD-STN

22h 20m2 stops

6:30 am - 6:30 pmSTN-IAD

17h 00m2 stops

$494

Find Deal

Sun, Nov 9 - Sat, Nov 15

6:50 pm - 10:40 amBWI-STN

10h 50m1 stop

11:40 am - 5:40 pmSTN-BWI

11h 00m1 stop

$524PLAY

Find Deal

Mon, Oct 6 - Sun, Oct 19

6:50 pm - 10:40 amBWI-STN

10h 50m1 stop

11:40 am - 5:40 pmSTN-BWI

11h 00m1 stop

$527PLAY

Find Deal

Mon, Oct 6 - Fri, Oct 10

11:15 pm - 2:40 pmIAD-LGW

10h 25m1 stop

3:40 pm - 7:20 pmLGW-IAD

32h 40m1 stop

$539Icelandair

Find Deal

Sun, Oct 5 - Wed, Oct 15

8:30 pm - 2:40 pmIAD-LGW

13h 10m1 stop

3:40 pm - 7:20 pmLGW-IAD

32h 40m1 stop

$543Icelandair

Find Deal

Wed, Oct 1 - Tue, Oct 14

3:35 pm - 8:10 amDCA-LGW

11h 35m1 stop

3:05 pm - 10:57 pmLGW-DCA

12h 52m1 stop

$607British Airways

Find Deal

Tue, Sep 30 - Thu, Oct 9

6:45 am - 8:10 amDCA-LGW

20h 25m1 stop

3:05 pm - 10:57 pmLGW-DCA

12h 52m1 stop

$609British Airways

Find Deal

Wed, Oct 1 - Tue, Oct 14

2:55 pm - 9:40 pmDCA-LHR

25h 45m1 stop

10:35 am - 6:51 pmLHR-DCA

13h 16m1 stop

$650Iberia

Find Deal

Sat, Oct 11 - Fri, Nov 7

2:59 pm - 9:40 amDCA-LHR

14h 41m1 stop

5:00 pm - 4:51 pmLHR-DCA

28h 51m1 stop

$652Iberia

Find Deal

Sun, Oct 26 - Wed, Nov 12

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

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

Scandinavian Airlines

Jan 12

IAD8:30 pmWashington, D.C. Dulles Intl

17h 00m

1 stop

LHR6:30 pmLondon Heathrow

Jan 25

LHR6:40 pmLondon Heathrow

25h 40m

1 stop

IAD3:20 pmWashington, D.C. Dulles Intl

$493

Find similar

Scandinavian Airlines

Oct 13

IAD10:05 pmWashington, D.C. Dulles Intl

15h 25m

1 stop

LHR6:30 pmLondon Heathrow

Oct 22

LHR6:40 amLondon Heathrow

18h 19m

1 stop

IAD7:59 pmWashington, D.C. Dulles Intl

$494

Find similar

Scandinavian Airlines

Feb 21

IAD8:30 pmWashington, D.C. Dulles Intl

17h 20m

2 stops

LHR6:50 pmLondon Heathrow

Feb 28

LHR6:40 amLondon Heathrow

17h 10m

1 stop

IAD6:50 pmWashington, D.C. Dulles Intl

$496

Find similar

TAP AIR PORTUGAL flights from Washington, D.C. to London

Our best TAP AIR PORTUGAL deals on Washington, D.C. to London flight tickets

TAP AIR PORTUGAL

Sep 8

IAD10:20 pmWashington, D.C. Dulles Intl

15h 30m

1 stop

LHR6:50 pmLondon Heathrow

Sep 16

LHR7:50 pmLondon Heathrow

24h 30m

1 stop

IAD3:20 pmWashington, D.C. Dulles Intl

$537

Find similar

TAP AIR PORTUGAL

Sep 8

IAD10:20 pmWashington, D.C. Dulles Intl

15h 30m

1 stop

LHR6:50 pmLondon Heathrow

Sep 16

LHR6:45 pmLondon Heathrow

25h 35m

1 stop

IAD3:20 pmWashington, D.C. Dulles Intl

$541

Find similar

TAP AIR PORTUGAL

Sep 8

IAD10:20 pmWashington, D.C. Dulles Intl

15h 30m

1 stop

LHR6:50 pmLondon Heathrow

Sep 16

LHR6:00 amLondon Heathrow

14h 20m

1 stop

IAD3:20 pmWashington, D.C. Dulles Intl

$542

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Mon 1/12

8:30 pm-6:30 pm

1 stop17h 00m

London Heathrow

Sun 1/25

6:40 pm-3:20 pm

1 stop25h 40m

$493

Washington, D.C.London

IAD - STN

IADSTN

Washington, D.C. Dulles Intl

Sun 11/9

7:40 pm-11:00 pm

2 stops22h 20m

London Stansted

Sat 11/15

6:30 am-6:30 pm

2 stops17h 00m

$494

BaltimoreLondon

BWI - STN

BWISTN

Baltimore/Washington

Mon 10/6

6:50 pm-10:40 am

1 stop10h 50m

London Stansted

Sun 10/19

11:40 am-5:40 pm

1 stop11h 00m

$524

BaltimoreLondon

BWI - STN

BWISTN

Baltimore/Washington

Mon 10/6

6:50 pm-10:40 am

1 stop10h 50m

London Stansted

Fri 10/10

11:40 am-5:40 pm

1 stop11h 00m

$527

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sun 10/5

11:15 pm-2:40 pm

1 stop10h 25m

London Gatwick

Wed 10/15

3:40 pm-7:20 pm

1 stop32h 40m

$539

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 10/1

8:30 pm-2:40 pm

1 stop13h 10m

London Gatwick

Tue 10/14

3:40 pm-7:20 pm

1 stop32h 40m

$543

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Tue 9/30

3:35 pm-8:10 am

1 stop11h 35m

London Gatwick

Thu 10/9

3:05 pm-10:57 pm

1 stop12h 52m

$607

Washington, D.C.London

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Wed 10/1

6:45 am-8:10 am

1 stop20h 25m

London Gatwick

Tue 10/14

3:05 pm-10:57 pm

1 stop12h 52m

$609

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sat 10/11

2:55 pm-9:40 pm

1 stop25h 45m

London Heathrow

Fri 11/7

10:35 am-6:51 pm

1 stop13h 16m

$650

Washington, D.C.London

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 10/26

2:59 pm-9:40 am

1 stop14h 41m

London Heathrow

Wed 11/12

5:00 pm-4:51 pm

1 stop28h 51m

$652

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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

Layovers

Other information

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 $644, 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 $653.

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 $758. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $903. 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 morning is the least expensive time of day to depart. momondo users have found prices as low as $761 when looking at flights departing in the morning. Flights to London are more costly in the afternoon, with an average ticket price of $822. 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 $753 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 $693 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.

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 17% 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	$385
Fastest flight time	7h 05m
Direct flights	Every day
Airports in London	1 airport

The best one-way flight to London from Washington, D.C. in the past 72 hours is $385. The best round-trip flight deal from Washington, D.C. to London found on momondo in the last 72 hours is $592.

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

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

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 9h 20m.
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 August 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 (38.22% of total bookings). The next most popular plane models are Airbus A380-800 (15.46%), Boeing 787-8 Dreamliner (9.48%), and Airbus A380 (6.07%).
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 27% of all bookings. The subsequent popular airlines are Iberia at 15%, 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 2,918 reviews	Search JetBlue flights
PLAY	PriceFrom $313	Free Cancellation	Rating 7.0 103 reviews	Search PLAY flights
Scandinavian Airlines	PriceFrom $409	Free Cancellation	Rating 7.4 1,477 reviews	Search Scandinavian Airlines flights
Delta	PriceFrom $421	Free Cancellation	Rating 7.9 7,979 reviews	Search Delta flights
Icelandair	PriceFrom $433	Free Cancellation	Rating 7.0 533 reviews	Search Icelandair flights
TAP AIR PORTUGAL	PriceFrom $441	Free Cancellation	Rating 7.1 1,962 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $447	Free Cancellation	Rating 6.8 7,359 reviews	Search Lufthansa flights
Virgin Atlantic	PriceFrom $497	Free Cancellation	Rating 7.4 658 reviews	Search Virgin Atlantic flights
American Airlines	PriceFrom $497	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $506	Free Cancellation	Rating 7.4 8,943 reviews	Search United Airlines 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 $421. Generally, Delta has 2 flights on this route every week with an average price of $795. Delta is rated 7.9/10 by our users.
KLM Flights From Washington, D.C. to London
KLM (7.8/10 from 1,387 reviews) operates around 2 flights from Washington, D.C. to London in any given week. The average KLM airfare for this route is around $615, 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.

Hounslow

Gatwick

Luton

Dover

Slough

Milton Keynes

Guildford

Dartford

Crawley

Stansted

Hayes

Chelmsford

Brentwood

Ilford

Folkestone

Colchester

Watford

Canterbury

Richmond

Wembley

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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Find better results for your trip to the United Kingdom

Cheap flights from Washington, D.C. to London from $188

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 10/12. 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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Scandinavian Airlines flights from Washington, D.C. to London

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

TAP AIR PORTUGAL flights from Washington, D.C. to London

Our best TAP AIR PORTUGAL 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 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.

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 17% 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?

WorldTicket and PLAY 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: 64% 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 Reykjavik (KEF) offer the lowest average round-trip price of $388.

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 August 2025. The most popular departure time for this route is 10:00PM, with 75% 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 August 2025, there are 204 flights per week flying from Washington, D.C. to London. The most common day of the week flights depart is Mon, 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 07m, 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United Kingdom