What day of the week experiences the fewest flight delays on this route?

Monday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

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

As of October 2026, there are 251 flights per week flying from Washington, D.C. to London Heathrow Airport. The most common day of the week flights depart is Tue, with 14% of flights taking off on this day.

How often are flights from Washington, D.C. to London delayed?

Historically, on average around 18% of flights between Washington, D.C. and London have experienced a delay on any given week. The average delay length over the past 12 months has been 174 minutes.

What is the most punctual flight time for Washington, D.C. to London flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

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

New York (JFK) has the shortest average layover time for this route: 1h 18m.

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

Flights connecting via New York (JFK) have the shortest average one-way travel time: 9h 52m.

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

Reykjavik (KEF) was the most common stop: 51% of momondo users choosing 1-stop flights on this route connected there.

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

35 flights are operational daily from Washington, D.C. to London Heathrow Airport as of October 2026. The most popular departure time for this route is 10:00PM, with 85% of flights per day taking off in the evening.

How long does it take to fly to London Heathrow Airport?

On average, it takes 7h 10m to fly from Washington, D.C. to London Heathrow Airport if you fly out of Baltimore (the most popular airport in Washington, D.C.) and into London Heathrow Airport (the most popular airport in London Heathrow Airport). If you’re flying out of Washington, D.C. and into London Heathrow Airport, then the flight time is around 8h 25m.

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

United Airlines, JetBlue, and ITA Airways are the most popular carriers operating from Washington, D.C. to London Heathrow

What airlines fly to London Heathrow Airport?

British Airways, United Airlines and American Airlines are the top three most popular airlines that fly to London Heathrow Airport 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 Heathrow Airport. Keep in mind that there are 18 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

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

Flights via Lisbon (LIS) offer the lowest average round-trip price of $652.

Which airline has the best punctuality record on Washington, D.C. to London flights?

According to our data, Virgin Atlantic have had the least number of delays on this route over the last 12 months; with about 13% of their flights experiencing any sort of delay.

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

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

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

As of October 2026, there are 18 operators available to choose from for flights from Washington, D.C. to London Heathrow Airport.

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

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 Washington, D.C. to London Heathrow Airport.

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

The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$297 Cheap Flights from Washington, D.C. to London Heathrow Airport in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington, D.C. to London

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:25 pm - 12:40 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 15m1 stop Lisbon Humberto Delgado

6:00 am - 2:40 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 40m1 stop Lisbon Humberto Delgado

$675TAP AIR PORTUGAL

Sat, Dec 5 - Tue, Dec 8

5:25 pm - 12:40 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 15m1 stop Lisbon Humberto Delgado

6:00 am - 2:40 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 40m1 stop Lisbon Humberto Delgado

$676TAP AIR PORTUGAL

Mon, Feb 8 - Tue, Feb 16

7:40 pm - 4:50 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

16h 10m2 stops Reykjavik Keflavik Intl Dublin

7:50 am - 6:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

15h 40m2 stops Dublin Reykjavik Keflavik Intl

$677Multiple Airlines

Tue, Dec 1 - Tue, Dec 8

11:05 am - 5:30 pmDCA Washington, D.C. Reagan-National-LHR London Heathrow

25h 25m3 stops Montreal Pierre Elliott Trudeau Intl Madrid Barajas Lisbon Humberto Delgado

6:30 pm - 9:59 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

32h 29m3 stops Lisbon Humberto Delgado Madrid Barajas Montreal Pierre Elliott Trudeau Intl

$678Multiple Airlines

Wed, Dec 2 - Mon, Dec 7

7:40 pm - 10:50 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 10m1 stop Reykjavik Keflavik Intl

12:15 pm - 6:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 15m1 stop Reykjavik Keflavik Intl

$683Icelandair

Mon, Nov 16 - Wed, Nov 25

5:50 pm - 11:50 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

13h 00m1 stop Madrid Barajas

6:15 am - 4:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

15h 15m1 stop Madrid Barajas

$685Iberia

Fri, Jan 29 - Mon, Feb 8

7:40 pm - 10:50 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 10m1 stop Reykjavik Keflavik Intl

12:15 pm - 6:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 15m1 stop Reykjavik Keflavik Intl

$688Icelandair

Mon, Nov 16 - Mon, Nov 23

8:30 pm - 12:55 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

59h 25m2 stops Kastrup Copenhagen Stockholm Arlanda

7:30 pm - 5:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 45m1 stop Kastrup Copenhagen

$688Scandinavian Airlines

Thu, Jan 14 - Sun, Jan 17

5:50 pm - 6:50 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

20h 00m1 stop Madrid Barajas

4:05 pm - 4:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

29h 15m1 stop Madrid Barajas

$689Iberia

Mon, Feb 1 - Sun, Feb 14

8:30 pm - 4:25 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

38h 55m2 stops Kastrup Copenhagen Oslo Gardermoen

10:20 am - 6:50 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 30m1 stop Kastrup Copenhagen

$694Scandinavian Airlines

Wed, Jan 20 - Sat, Jan 23

Cheap last minute flights

Enter your travel dates to find the best prices.

11:30 pm - 9:35 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

18h 05m1 stop Lisbon Humberto Delgado

6:30 pm - 3:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

25h 45m1 stop Lisbon Humberto Delgado

$717TAP AIR PORTUGAL

Sun, Oct 25 - Wed, Nov 4

11:30 pm - 9:35 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

18h 05m1 stop Lisbon Humberto Delgado

12:25 pm - 8:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 05m1 stop Lisbon Humberto Delgado

$746TAP AIR PORTUGAL

Sun, Oct 25 - Fri, Nov 6

3:38 pm - 6:30 amDCA Washington, D.C. Reagan-National-LHR London Heathrow

9h 52m1 stop Boston Logan Intl

9:20 am - 6:00 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

13h 40m1 stop Boston Logan Intl

$774JetBlue

Tue, Oct 20 - Wed, Dec 9

6:20 am - 8:45 pmDCA Washington, D.C. Reagan-National-LHR London Heathrow

9h 25m1 stop New York John F Kennedy Intl

9:20 am - 7:01 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

13h 41m1 stop Boston Logan Intl

$792JetBlue

Tue, Oct 20 - Sat, Oct 31

8:20 pm - 5:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

15h 40m1 stop Kastrup Copenhagen

6:40 am - 7:50 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

17h 10m1 stop Kastrup Copenhagen

$804Scandinavian Airlines

Sat, Oct 24 - Sat, Oct 31

8:20 pm - 5:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

15h 40m1 stop Kastrup Copenhagen

6:40 am - 7:50 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

17h 10m2 stops Oslo Gardermoen Kastrup Copenhagen

$820Scandinavian Airlines

Sat, Oct 24 - Sat, Oct 31

8:20 pm - 12:25 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

35h 05m3 stops Zurich Madrid Barajas Lisbon Humberto Delgado

6:30 pm - 9:05 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

30h 35m3 stops Lisbon Humberto Delgado Madrid Barajas Munich Franz Josef Strauss

$841Multiple Airlines

Fri, Oct 23 - Tue, Oct 27

8:20 pm - 4:25 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

15h 05m1 stop Zurich

9:00 am - 6:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 00m1 stop Zurich

$857SWISS

Tue, Oct 20 - Tue, Oct 27

1:15 pm - 9:50 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

15h 35m1 stop Istanbul

4:30 pm - 12:45 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

24h 15m1 stop Istanbul

$873Turkish Airlines

Wed, Oct 21 - Wed, Oct 28

8:20 pm - 4:35 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

15h 15m2 stops Zurich Geneva Geneve-Cointrin

6:00 am - 5:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

16h 00m1 stop Zurich

$886SWISS

Wed, Oct 21 - Wed, Nov 11

Cheap direct flights

Enter your travel dates to find the best prices.

6:55 pm - 7:05 amBWI Baltimore/Washington-LHR London Heathrow

7h 10mnonstop

1:50 pm - 5:05 pmLHR London Heathrow-BWI Baltimore/Washington

8h 15mnonstop

$702British Airways

Thu, Jan 21 - Tue, Jan 26

6:05 pm - 6:15 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mnonstop

12:15 pm - 3:40 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mnonstop

$717British Airways

Wed, Nov 18 - Wed, Nov 25

6:55 pm - 7:20 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mnonstop

1:20 pm - 5:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 40mnonstop

$832Virgin Atlantic

Sun, Nov 15 - Tue, Nov 24

6:55 pm - 7:05 amBWI Baltimore/Washington-LHR London Heathrow

7h 10mnonstop

1:50 pm - 5:05 pmLHR London Heathrow-BWI Baltimore/Washington

8h 15mnonstop

$838Finnair

Sun, Nov 15 - Tue, Nov 24

6:05 pm - 6:15 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mnonstop

12:15 pm - 3:40 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mnonstop

$838Finnair

Sun, Nov 15 - Tue, Nov 24

9:45 pm - 10:00 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 15mnonstop

12:35 pm - 3:50 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 15mnonstop

$854Iberia

Mon, Mar 1 - Mon, Mar 29

6:55 pm - 7:05 amBWI Baltimore/Washington-LHR London Heathrow

7h 10mnonstop

1:50 pm - 5:05 pmLHR London Heathrow-BWI Baltimore/Washington

8h 15mnonstop

$865Iberia

Tue, Jan 19 - Thu, Jan 21

6:55 pm - 7:20 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mnonstop

1:05 pm - 4:45 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 40mnonstop

$873Virgin Atlantic

Sat, Jan 16 - Sun, Jan 24

6:55 pm - 7:20 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mnonstop

12:15 pm - 3:40 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mnonstop

$880Multiple Airlines

Mon, Feb 1 - Sun, Feb 14

6:05 pm - 6:15 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mnonstop

12:15 pm - 3:40 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mnonstop

$888Multiple Airlines

Tue, Jan 19 - Wed, Jan 27

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

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

United Airlines

Jan 13

IAD10:15 pmWashington, D.C. Dulles Intl

7h 35m

LHR10:50 amLondon Heathrow

Jan 15

LHR9:00 amLondon Heathrow

13h 00m

1 stop

IAD5:00 pmWashington, D.C. Dulles Intl

$731

United Airlines

Oct 28

BWI6:10 amBaltimore/Washington

19h 45m

1 stop

LHR5:55 amLondon Heathrow

Nov 10

LHR9:00 amLondon Heathrow

17h 42m

2 stops

BWI9:42 pmBaltimore/Washington

$935

Air Canada flights from Washington, D.C. to London Heathrow Airport

Our best Air Canada deals on Washington, D.C. to London Heathrow Airport flight tickets

Air Canada

Feb 16

DCA6:55 pmWashington, D.C. Reagan-National

11h 25m

1 stop

LHR11:20 amLondon Heathrow

Feb 18

LHR9:00 amLondon Heathrow

17h 59m

2 stops

DCA9:59 pmWashington, D.C. Reagan-National

$742

Air Canada

Jan 18

DCA4:00 pmWashington, D.C. Reagan-National

10h 10m

1 stop

LHR7:10 amLondon Heathrow

Jan 20

LHR6:50 amLondon Heathrow

20h 09m

2 stops

DCA9:59 pmWashington, D.C. Reagan-National

$743

Air Canada

Jan 18

DCA12:55 pmWashington, D.C. Reagan-National

14h 35m

2 stops

LHR8:30 amLondon Heathrow

Jan 20

LHR6:50 amLondon Heathrow

13h 34m

2 stops

DCA3:24 pmWashington, D.C. Reagan-National

$748

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Sat 12/5

5:25 pm-12:40 pm

1 stop14h 15m

London Heathrow

Tue 12/8

6:00 am-2:40 pm

1 stop13h 40m

$675

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Mon 2/8

5:25 pm-12:40 pm

1 stop14h 15m

London Heathrow

Tue 2/16

6:00 am-2:40 pm

1 stop13h 40m

$676

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Tue 12/1

7:40 pm-4:50 pm

2 stops16h 10m

London Heathrow

Tue 12/8

7:50 am-6:30 pm

2 stops15h 40m

$677

Washington, D.C.London

DCA Washington, D.C. Reagan-National - LHR London Heathrow

DCALHR

Washington, D.C. Reagan-National

Wed 12/2

11:05 am-5:30 pm

3 stops25h 25m

London Heathrow

Mon 12/7

6:30 pm-9:59 pm

3 stops32h 29m

$678

Quickest round-trip

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Mon 11/16

7:40 pm-10:50 am

1 stop10h 10m

London Heathrow

Wed 11/25

12:15 pm-6:30 pm

1 stop11h 15m

$683

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Fri 1/29

5:50 pm-11:50 am

1 stop13h 00m

London Heathrow

Mon 2/8

6:15 am-4:30 pm

1 stop15h 15m

$685

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Mon 11/16

7:40 pm-10:50 am

1 stop10h 10m

London Heathrow

Mon 11/23

12:15 pm-6:30 pm

1 stop11h 15m

$688

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Thu 1/14

8:30 pm-12:55 pm

2 stops59h 25m

London Heathrow

Sun 1/17

7:30 pm-5:15 pm

1 stop26h 45m

$688

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Mon 2/1

5:50 pm-6:50 pm

1 stop20h 00m

London Heathrow

Sun 2/14

4:05 pm-4:20 pm

1 stop29h 15m

$689

Washington, D.C.London

IAD Washington, D.C. Dulles Intl - LHR London Heathrow

IADLHR

Washington, D.C. Dulles Intl

Wed 1/20

8:30 pm-4:25 pm

2 stops38h 55m

London Heathrow

Sat 1/23

10:20 am-6:50 pm

1 stop13h 30m

$694

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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

Delays

Layovers

Other information

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

Prices are currently low for flights on this route.

Typical prices usually range from $734 to $1,084.
The lowest price recently found on this route was $675.

What is the cheapest month to fly to London Heathrow Airport?

The month of February is, on average, the cheapest month to fly to London Heathrow Airport from Washington, D.C., with most prices found around $693. If you’re not able to fly to London Heathrow Airport in February, then January is your next best option. Flight prices from Washington, D.C. to London Heathrow Airport during January average around $742.

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

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $933. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $1,035.

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

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Washington, D.C. to London Heathrow Airport in the afternoon for as low as $977. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $995.

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

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

How far in advance should I book a flight from Washington, D.C. to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $918 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Washington, D.C. for as low as $862 on momondo.

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

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

You could potentially save up to 12% on your flight if you consider stops on a Washington, D.C. to London Heathrow Airport flight.

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

As of October 2026, prices for Washington, D.C. to London Heathrow Airport flights are approximately 10% cheaper when compared to flights at the same time last year.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to London Heathrow Airport 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 Heathrow Airport (WAS to LHR) flight deals and tips

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

Best Price Found	$297
Fastest flight time	7h 10m
Direct flights	Every day

The best one-way flight to London Heathrow Airport from Washington, D.C. in the past 72 hours is $297. The best round-trip flight deal from Washington, D.C. to London Heathrow Airport found on momondo in the last 72 hours is $675.

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

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

Search flight deals

Frequently asked questions about flying from Washington, D.C. to London Heathrow Airport

How far is Washington, D.C. to London Heathrow by plane?
Washington, D.C. and London Heathrow are 3649.4 mi apart from one another. 7h 10m is a normal flight duration for this route.
When did momondo last update prices for flights from Washington, D.C. to London Heathrow Airport?
Prices for flights from Washington, D.C. to London Heathrow Airport were last updated today.
How many operators does momondo search for flights from Washington, D.C. to London Heathrow Airport?
As of October 2026, there are 18 operators available to choose from for flights from Washington, D.C. to London Heathrow Airport.
How old do you have to be to fly from Washington, D.C. to London Heathrow Airport?
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 Washington, D.C. to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Washington, D.C. to London Heathrow Airport?
momondo data reveals that the most frequently booked plane model on the route from Washington, D.C. to London Heathrow Airport is Boeing 777, representing 49.69% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 9.90%, Boeing 777-300ER at 7.55%, and Airbus A330-900neo at 6.93%.
What is the most popular airline from Washington, D.C. to London Heathrow Airport?
momondo data reveals that the most frequently booked airline on the route from Washington, D.C. to London Heathrow Airport is British Airways, representing 35% of all bookings. The subsequent popular airlines are United Airlines at 18%, American Airlines at 11%, and Virgin Atlantic at 9%.

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

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

Airline	Rating	Free Cancellation	Price
TAP AIR PORTUGAL	PriceFrom $422	Free Cancellation	Rating 7.2 2,381 reviews	Search TAP AIR PORTUGAL flights
Virgin Atlantic	PriceFrom $432	Free Cancellation	Rating 7.5 696 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $450	Free Cancellation	Rating 7.8 8,649 reviews	Search Delta flights
United Airlines	PriceFrom $462	Free Cancellation	Rating 7.3 10,390 reviews	Search United Airlines flights
Icelandair	PriceFrom $481	Free Cancellation	Rating 6.9 763 reviews	Search Icelandair flights
Iberia	PriceFrom $500	Free Cancellation	Rating 7.0 3,242 reviews	Search Iberia flights
Scandinavian Airlines	PriceFrom $568	Free Cancellation	Rating 7.4 2,019 reviews	Search Scandinavian Airlines flights
Air France	PriceFrom $581	Free Cancellation	Rating 7.5 1,651 reviews	Search Air France flights
British Airways	PriceFrom $589	Free Cancellation	Rating 6.7 8,266 reviews	Search British Airways flights
Finnair	PriceFrom $591	Free Cancellation	Rating 7.6 1,418 reviews	Search Finnair flights

KLM Flights From Washington, D.C. to London Heathrow Airport
KLM flight deals from Washington, D.C. to London Heathrow Airport start from $618 round-trip. Over the 7 KLM flights for this route in a normal week, average airfare is usually $1,157 round-trip - but some users have found much cheaper deals with momondo.
Delta Flights From Washington, D.C. to London Heathrow Airport
Across 8,649 Delta reviews on momondo, the average score is 7.8/10. Delta flies from Washington, D.C. to London Heathrow Airport about 7 times each week, with ticket deals ranging from $450 to $1,000. Price data is based on momondo searches in the last 72 hours.

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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?

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

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 London Gatwick Airportfrom $407

Flights to London Stansted Airportfrom $402

Flights to London City Airportfrom $548

Flights to London Luton Airportfrom $399

Flights to Glasgow Intl Airportfrom $433

Flights to London Southend Airportfrom $653

Flights to Belfast Intl Airportfrom $742

Flights to Belfast City Airportfrom $725

Cheap flights from Washington, D.C. to London from $297

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 4/13. 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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United Airlines flights from Washington, D.C. to London Heathrow Airport

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

Air Canada flights from Washington, D.C. to London Heathrow Airport

Our best Air Canada deals on Washington, D.C. to London Heathrow Airport flight tickets

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Traveling to a place near London?

Why use momondo?

An easier way to manage your London Heathrow Airport 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.

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