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

Reykjavik (KEF) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Boston (BOS) offer the lowest average round-trip price of $436.

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

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

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

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 10h 50m.

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

The number of flights available between London and Washington, D.C. is 31 per day as of October 2025. The most frequent departure time is 12:00PM, with 100% of daily flights leaving in the afternoon.

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

217 flights are operational weekly from London to Washington, D.C. as of October 2025. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.

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

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

What airlines fly to Washington, D.C.?

British Airways, United Airlines and Delta are the top three most popular airlines that fly to Washington, D.C. from London according to our data. British Airways is the first choice among our users, with 60% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 14 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

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

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

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

As of October 2025, there are 14 operators available to choose from for flights from London to Washington, D.C..

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 travel and health documents you'll need for your trip to Washington, D.C. 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 Washington, D.C.. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$433 Cheap Flights from London to Washington, D.C. in 2025/26

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

Prices are currently low for flights on this route. Typical prices usually range from $607 to $945. The lowest price recently found on this route was $526.

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6:30 pm - 3:15 pmLHR-IAD

25h 45m1 stop

5:30 pm - 10:40 pmIAD-LHR

24h 10m1 stop

$526TAP AIR PORTUGAL

Find Deal

Sun, Nov 23 - Mon, Dec 1

12:25 pm - 7:30 pmLTN-IAD

12h 05m1 stop

5:05 pm - 7:35 amIAD-LTN

9h 30m1 stop

$526Multiple Airlines

Find Deal

Sat, Nov 8 - Sat, Nov 15

9:20 am - 8:05 amLHR-DCA

27h 45m1 stop

8:35 pm - 6:55 amDCA-LHR

29h 20m1 stop

$559Icelandair

Find Deal

Wed, Dec 10 - Sun, Dec 14

9:20 am - 9:33 pmLHR-DCA

17h 13m1 stop

3:09 pm - 6:55 amDCA-LHR

10h 46m1 stop

$569Icelandair

Find Deal

Mon, Nov 3 - Mon, Nov 10

8:55 am - 7:38 pmLHR-BWI

15h 43m1 stop

6:59 pm - 6:25 amBWI-LHR

30h 26m1 stop

$656Virgin Atlantic

Find Deal

Sat, Dec 13 - Tue, Dec 23

1:05 pm - 12:26 amLHR-BWI

16h 21m2 stops

12:15 pm - 7:50 amBWI-LHR

14h 35m2 stops

$658Virgin Atlantic

Find Deal

Wed, Dec 17 - Sat, Jan 10

6:30 am - 5:03 pmLHR-BWI

15h 33m2 stops

12:15 pm - 6:55 amBWI-LHR

14h 40m2 stops

$679Delta

Find Deal

Thu, Mar 5 - Thu, Mar 12

7:45 am - 9:31 pmLCY-BWI

18h 46m2 stops

12:16 pm - 7:15 amBWI-LCY

13h 59m2 stops

$741Delta

Find Deal

Fri, Nov 7 - Sun, Nov 9

11:20 am - 11:07 pmLGW-DCA

16h 47m1 stop

8:19 am - 7:30 amDCA-LGW

18h 11m1 stop

$802British Airways

Find Deal

Fri, Dec 12 - Sun, Dec 14

11:20 am - 11:07 pmLGW-DCA

16h 47m1 stop

11:45 am - 7:30 amDCA-LGW

14h 45m1 stop

$858British Airways

Find Deal

Tue, Nov 25 - Tue, Dec 2

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

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

TAP AIR PORTUGAL

Nov 23

LHR6:30 pmLondon Heathrow

25h 45m

1 stop

IAD3:15 pmWashington, D.C. Dulles Intl

Dec 1

IAD5:30 pmWashington, D.C. Dulles Intl

24h 10m

1 stop

LHR10:40 pmLondon Heathrow

$526

Find similar

TAP AIR PORTUGAL

Nov 24

LHR6:30 pmLondon Heathrow

25h 05m

1 stop

IAD2:35 pmWashington, D.C. Dulles Intl

Dec 1

IAD5:30 pmWashington, D.C. Dulles Intl

14h 10m

1 stop

LHR12:40 pmLondon Heathrow

$527

Find similar

TAP AIR PORTUGAL

Dec 6

LHR6:00 amLondon Heathrow

14h 15m

1 stop

IAD3:15 pmWashington, D.C. Dulles Intl

Dec 13

IAD5:30 pmWashington, D.C. Dulles Intl

24h 10m

1 stop

LHR10:40 pmLondon Heathrow

$528

Find similar

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

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

Scandinavian Airlines

Feb 2

LHR10:20 amLondon Heathrow

11h 55m

1 stop

IAD5:15 pmWashington, D.C. Dulles Intl

Feb 9

IAD8:30 pmWashington, D.C. Dulles Intl

14h 30m

1 stop

LHR4:00 pmLondon Heathrow

$568

Find similar

Scandinavian Airlines

Mar 5

LHR6:40 amLondon Heathrow

15h 35m

1 stop

IAD5:15 pmWashington, D.C. Dulles Intl

Mar 14

IAD9:30 pmWashington, D.C. Dulles Intl

32h 05m

2 stops

LHR9:35 amLondon Heathrow

$574

Find similar

Scandinavian Airlines

Feb 2

LHR7:05 amLondon Heathrow

15h 10m

2 stops

IAD5:15 pmWashington, D.C. Dulles Intl

Feb 9

IAD8:30 pmWashington, D.C. Dulles Intl

14h 55m

2 stops

LHR4:25 pmLondon Heathrow

$578

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 11/23

6:30 pm-3:15 pm

1 stop25h 45m

Washington, D.C. Dulles Intl

Mon 12/1

5:30 pm-10:40 pm

1 stop24h 10m

$526

LondonWashington, D.C.

LTN - IAD

LTNIAD

London Luton

Sat 11/8

12:25 pm-7:30 pm

1 stop12h 05m

Washington, D.C. Dulles Intl

Sat 11/15

5:05 pm-7:35 am

1 stop9h 30m

$526

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 12/10

9:20 am-8:05 am

1 stop27h 45m

Washington, D.C. Reagan-National

Sun 12/14

8:35 pm-6:55 am

1 stop29h 20m

$559

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Mon 11/3

9:20 am-9:33 pm

1 stop17h 13m

Washington, D.C. Reagan-National

Mon 11/10

3:09 pm-6:55 am

1 stop10h 46m

$569

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Sat 12/13

8:55 am-7:38 pm

1 stop15h 43m

Baltimore/Washington

Tue 12/23

6:59 pm-6:25 am

1 stop30h 26m

$656

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Wed 12/17

1:05 pm-12:26 am

2 stops16h 21m

Baltimore/Washington

Sat 1/10

12:15 pm-7:50 am

2 stops14h 35m

$658

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Thu 3/5

6:30 am-5:03 pm

2 stops15h 33m

Baltimore/Washington

Thu 3/12

12:15 pm-6:55 am

2 stops14h 40m

$679

LondonBaltimore

LCY - BWI

LCYBWI

London City

Fri 11/7

7:45 am-9:31 pm

2 stops18h 46m

Baltimore/Washington

Sun 11/9

12:16 pm-7:15 am

2 stops13h 59m

$741

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Fri 12/12

11:20 am-11:07 pm

1 stop16h 47m

Washington, D.C. Reagan-National

Sun 12/14

8:19 am-7:30 am

1 stop18h 11m

$802

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Tue 11/25

11:20 am-11:07 pm

1 stop16h 47m

Washington, D.C. Reagan-National

Tue 12/2

11:45 am-7:30 am

1 stop14h 45m

$858

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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

Prices

Airlines

Layovers

Other information

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 month of February is, on average, the cheapest month to fly to Washington, D.C. from London, with most prices found around $620. If you’re not able to fly to Washington, D.C. in February, then September is your next best option. Flight prices from London to Washington, D.C. during September average around $639.

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 Thursday. momondo users have found tickets for Thursday departures for as low as $795. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London to Washington, D.C. for around $951.

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 $762. Flying to Washington, D.C. in the evening is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around $869. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 $780 when searching weeks out. 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 $737 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 18% 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 October 2025, prices for London to Washington, D.C. flights are approximately 131% 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 round-trip 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	$606
Fastest flight time	8h 00m
Direct flights	Every day
Airports in Washington, D.C.	2 airports

The best one-way flight to Washington, D.C. from London in the past 72 hours is $606. The best round-trip flight deal from London to Washington, D.C. found on momondo in the last 72 hours is $576.

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)

Search flight deals

How far is London to Washington, D.C. by plane?
There are 3662.3 mi between London and Washington, D.C.. By plane, this route typically takes 10h 35m.
When did momondo last update prices for flights from London to Washington, D.C.?
Prices for flights from London to Washington, D.C. are updated daily.
How many operators does momondo search for flights from London to Washington, D.C.?
As of October 2025, there are 14 operators available to choose from for flights from London to Washington, D.C..
How old do you have to be to fly from London to Washington, D.C.?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check 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 travel and health documents you'll need for your trip to Washington, D.C. 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 Washington, D.C.. 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 London to Washington, D.C.?
momondo data reveals that the most frequently booked plane model on the route from London to Washington, D.C. is Boeing 777, representing 35.41% of all bookings. The subsequent popular models are Airbus A330-300 at 11.19%, Boeing 787-9 Dreamliner at 10.01%, and Airbus A380-800 at 9.64%.
What is the most popular airline from London to Washington, D.C.?
Based on momondo bookings for flights between London and Washington, D.C., the leading airline is British Airways, making up 26% of the total bookings. Other popular airlines include PLAY with 17%, Virgin Atlantic with 11%, and United Airlines with 8%.

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
PLAY	PriceFrom $304	Free Cancellation	Rating 7.0 103 reviews	Search PLAY flights
Delta	PriceFrom $320	Free Cancellation	Rating 7.9 7,972 reviews	Search Delta flights
Scandinavian Airlines	PriceFrom $390	Free Cancellation	Rating 7.4 1,529 reviews	Search Scandinavian Airlines flights
Austrian Airlines	PriceFrom $431	Free Cancellation	Rating 7.6 853 reviews	Search Austrian Airlines flights
TAP AIR PORTUGAL	PriceFrom $473	Free Cancellation	Rating 7.1 2,009 reviews	Search TAP AIR PORTUGAL flights
Icelandair	PriceFrom $490	Free Cancellation	Rating 7.0 555 reviews	Search Icelandair flights
American Airlines	PriceFrom $562	Free Cancellation	Rating 7.2 11,044 reviews	Search American Airlines flights
United Airlines	PriceFrom $567	Free Cancellation	Rating 7.4 8,973 reviews	Search United Airlines flights
British Airways	PriceFrom $594	Free Cancellation	Rating 6.7 7,451 reviews	Search British Airways flights
Air Canada	PriceFrom $635	Free Cancellation	Rating 7.1 10,286 reviews	Search Air Canada flights

Delta Flights From London to Washington, D.C.
The lowest priced Delta flight from London to Washington, D.C. from the last 72 hours was $320. Generally, Delta has 7 flights on this route every week with an average price of $962. Delta is rated 7.9/10 by our users.
Austrian Airlines Flights From London to Washington, D.C.
Austrian Airlines (7.6/10 from 853 reviews) operates around 14 flights from London to Washington, D.C. in any given week. The average Austrian Airlines airfare for this route is around $858, with deals from around $431 rare but found on momondo. Referenced prices are for round-trip London to Washington, D.C. flight searches in the last 72 hours.

Alexandria

Gettysburg

National Harbor

Arlington

Woodbridge

Waldorf

Tysons

Laurel

Colonial Beach

Silver Spring

Fredericksburg

Towson

Rockville

Manassas

Fairfax

Reston

Gaithersburg

Glen Burnie

Linthicum Heights

Springfield

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 allows you to filter the results for London to Washington, D.C. flights to just show those with flexible booking policies.

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?

Price alerts on flights to Washington, D.C. from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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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.

Washington, D.C. Reagan-National Airport

Washington, D.C. Dulles Intl Airport

Popular cities in the United States

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Flights to Orlandofrom $63

Flights to Las Vegasfrom $38

Flights to San Franciscofrom $38

Flights to Bostonfrom $61

Flights to Atlantafrom $48

Flights to Dallasfrom $57

Flights to Seattlefrom $75

Flights to Denverfrom $39

Cheap flights from London to Washington, D.C. from $433

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 10/31. 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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TAP AIR PORTUGAL flights from London to Washington, D.C.

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

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

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

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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.?

What is the cheapest day to depart on your flight to Washington, D.C.?

What is the cheapest time of day to depart on your flight to Washington, D.C.?

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.?

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 18% 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 October 2025, prices for London to Washington, D.C. flights are approximately 131% more expensive when compared to flights at the same time last year.

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

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

What airlines fly to Washington, D.C.?

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

Reykjavik (KEF) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Boston (BOS) offer the lowest average round-trip price of $436.

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

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 10h 50m.

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

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

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

The number of flights available between London and Washington, D.C. is 31 per day as of October 2025. The most frequent departure time is 12:00PM, with 100% of daily flights leaving in the afternoon.

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

217 flights are operational weekly from London to Washington, D.C. as of October 2025. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.

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

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

Fastest flight time

Direct flights

Airports in Washington, D.C.

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

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

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.?

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

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

Delta Flights From London to Washington, D.C.

Austrian Airlines Flights From London to Washington, D.C.

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

Why use momondo?

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

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

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

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

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