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 07m.

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.

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

22 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 11:00PM, with 92% of flights per day taking off in the evening.

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.

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 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.

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 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.

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

Reykjavik (KEF) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

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

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

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

As of October 2026, there are 155 flights per week flying from Washington, D.C. to London Heathrow Airport. The most common day of the week flights depart is Mon, with 21% of flights taking off on this day.

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.

$275 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.

5:50 pm - 7:05 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

20h 15m1 stop Madrid Barajas

6:00 am - 4:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

15h 20m1 stop Madrid Barajas

$673Iberia

Sat, Jan 9 - Sat, Jan 16

7:40 pm - 7:30 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

18h 50m1 stop Reykjavik Keflavik Intl

8:35 pm - 6:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 55m1 stop Reykjavik Keflavik Intl

$674Icelandair

Wed, Dec 9 - Wed, Dec 16

8:30 pm - 5:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

15h 30m2 stops Kastrup Copenhagen Stockholm Arlanda

6:40 am - 5:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

15h 35m1 stop Kastrup Copenhagen

$674Scandinavian Airlines

Sat, Dec 5 - Mon, Dec 7

10:30 pm - 5:30 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 00m1 stop Lisbon Humberto Delgado

6:00 am - 3:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

14h 15m1 stop Lisbon Humberto Delgado

$675TAP AIR PORTUGAL

Sun, Nov 29 - Thu, Dec 10

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

10h 10m1 stop Reykjavik Keflavik Intl

12:15 pm - 10:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

14h 00m1 stop Reykjavik Keflavik Intl

$675Icelandair

Mon, Mar 1 - Fri, Mar 19

5:50 pm - 10:35 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

11h 45m1 stop Madrid Barajas

3:45 pm - 4:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

29h 35m1 stop Madrid Barajas

$675Iberia

Fri, Feb 19 - Mon, Feb 22

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

7h 15mnonstop

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

11h 15m1 stop Reykjavik Keflavik Intl

$678Multiple Airlines

Thu, Dec 10 - Thu, Dec 17

11:05 am - 8:05 pmDCA Washington, D.C. Reagan-National-LHR London Heathrow

28h 00m3 stops Montreal Pierre Elliott Trudeau Intl Madrid Barajas Barcelona-El Prat

7:55 pm - 9:59 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

31h 04m3 stops Lisbon Humberto Delgado Madrid Barajas Montreal Pierre Elliott Trudeau Intl

$681Multiple Airlines

Wed, Dec 9 - Sat, Dec 12

8:30 pm - 4:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 30m1 stop Kastrup Copenhagen

10:20 am - 6:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 55m1 stop Kastrup Copenhagen

$682Scandinavian Airlines

Wed, Mar 3 - Mon, Mar 15

5:25 pm - 9:35 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

23h 10m1 stop Lisbon Humberto Delgado

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

25h 45m1 stop Lisbon Humberto Delgado

$696TAP AIR PORTUGAL

Tue, Nov 17 - Wed, Nov 25

Cheap last minute flights

Enter your travel dates to find the best prices.

4:00 pm - 7:10 amDCA Washington, D.C. Reagan-National-LHR London Heathrow

10h 10m1 stop Montreal Pierre Elliott Trudeau Intl

3:00 pm - 10:38 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

12h 38m1 stop Toronto Pearson Intl

$733Air Canada

Sun, Nov 1 - Sat, Nov 7

7:20 pm - 6:40 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 20mnonstop

8:35 pm - 6:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 55m1 stop Reykjavik Keflavik Intl

$786Multiple Airlines

Fri, Oct 30 - Tue, Nov 3

6:15 pm - 10:10 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

11h 55m1 stop Dublin

6:30 pm - 4:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 50m2 stops Lisbon Humberto Delgado Madrid Barajas

$818Multiple Airlines

Thu, Oct 29 - Thu, Nov 5

8:30 pm - 4:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 30m1 stop Kastrup Copenhagen

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

17h 10m1 stop Kastrup Copenhagen

$824Scandinavian Airlines

Mon, Nov 2 - Sat, Nov 21

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

7h 15mnonstop

4:25 pm - 7:55 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 30mnonstop

$829British Airways

Sat, Oct 31 - Sun, Nov 8

7:05 pm - 6:15 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 10mnonstop

4:25 pm - 7:55 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 30mnonstop

$829British Airways

Fri, Oct 30 - Sun, Nov 8

8:30 pm - 4:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 30m1 stop Kastrup Copenhagen

10:20 am - 5:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

11h 55m1 stop Kastrup Copenhagen

$832Scandinavian Airlines

Mon, Nov 2 - Wed, Nov 18

6:15 am - 9:40 pmDCA Washington, D.C. Reagan-National-LHR London Heathrow

11h 25m1 stop New York John F Kennedy Intl

9:20 am - 8:09 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

15h 49m1 stop Boston Logan Intl

$847JetBlue

Wed, Oct 28 - Wed, Nov 4

6:15 am - 9:40 pmDCA Washington, D.C. Reagan-National-LHR London Heathrow

11h 25m1 stop New York John F Kennedy Intl

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

13h 40m1 stop Boston Logan Intl

$847JetBlue

Wed, Oct 28 - Tue, Nov 3

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

$854Icelandair

Mon, Nov 2 - Tue, Nov 10

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

$704British 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

$714British Airways

Wed, Jan 20 - Tue, Jan 26

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

7h 15mnonstop

5:05 pm - 8:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 15mnonstop

$818Iberia

Mon, Mar 1 - Tue, Mar 30

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

$820Iberia

Wed, Mar 3 - Wed, Mar 10

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

$859Multiple Airlines

Tue, Dec 8 - Tue, Dec 15

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

$868Finnair

Mon, Feb 1 - Thu, Feb 11

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

$868Finnair

Mon, Feb 1 - Thu, Feb 4

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

$870Virgin Atlantic

Sun, Nov 29 - Tue, Dec 8

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

$877Virgin Atlantic

Sun, Nov 15 - Sun, Nov 22

6:40 pm - 7:00 amBWI Baltimore/Washington-LHR London Heathrow

7h 20mnonstop

1:30 pm - 4:45 pmLHR London Heathrow-BWI Baltimore/Washington

8h 15mnonstop

$890Multiple Airlines

Sun, Mar 28 - Sun, Apr 4

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JetBlue flights from Washington, D.C. to London Heathrow Airport

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

JetBlue

Jan 7

DCA6:00 amWashington, D.C. Reagan-National

10h 40m

1 stop

LHR9:40 pmLondon Heathrow

Jan 14

LHR9:20 amLondon Heathrow

14h 37m

1 stop

DCA6:57 pmWashington, D.C. Reagan-National

$798

JetBlue

Feb 25

DCA11:55 amWashington, D.C. Reagan-National

14h 00m

1 stop

LHR6:55 amLondon Heathrow

Mar 6

LHR9:20 amLondon Heathrow

16h 55m

1 stop

DCA9:15 pmWashington, D.C. Reagan-National

$800

JetBlue

Nov 5

DCA6:15 amWashington, D.C. Reagan-National

10h 25m

1 stop

LHR9:40 pmLondon Heathrow

Nov 8

LHR7:45 amLondon Heathrow

19h 30m

1 stop

DCA10:15 pmWashington, D.C. Reagan-National

$811

Icelandair flights from Washington, D.C. to London Heathrow Airport

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

Icelandair

Nov 18

IAD7:40 pmWashington, D.C. Dulles Intl

18h 50m

1 stop

LHR7:30 pmLondon Heathrow

Dec 15

LHR8:35 pmLondon Heathrow

26h 55m

1 stop

IAD6:30 pmWashington, D.C. Dulles Intl

$695

Icelandair

Dec 13

BWI7:40 pmBaltimore/Washington

10h 10m

1 stop

LHR10:50 amLondon Heathrow

Dec 18

LHR12:15 pmLondon Heathrow

11h 25m

1 stop

BWI6:40 pmBaltimore/Washington

$699

Icelandair

Jan 21

IAD7:40 pmWashington, D.C. Dulles Intl

10h 10m

1 stop

LHR10:50 amLondon Heathrow

Jan 25

LHR12:15 pmLondon Heathrow

11h 15m

1 stop

IAD6:30 pmWashington, D.C. Dulles Intl

$700

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 1/9

5:50 pm-7:05 pm

1 stop20h 15m

London Heathrow

Sat 1/16

6:00 am-4:20 pm

1 stop15h 20m

$673

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Wed 12/9

7:40 pm-7:30 pm

1 stop18h 50m

London Heathrow

Wed 12/16

8:35 pm-6:30 pm

1 stop26h 55m

$674

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Sat 12/5

8:30 pm-5:00 pm

2 stops15h 30m

London Heathrow

Mon 12/7

6:40 am-5:15 pm

1 stop15h 35m

$674

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Sun 11/29

10:30 pm-5:30 pm

1 stop14h 00m

London Heathrow

Thu 12/10

6:00 am-3:15 pm

1 stop14h 15m

$675

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Mon 3/1

7:40 pm-10:50 am

1 stop10h 10m

London Heathrow

Fri 3/19

12:15 pm-10:15 pm

1 stop14h 00m

$675

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Fri 2/19

5:50 pm-10:35 am

1 stop11h 45m

London Heathrow

Mon 2/22

3:45 pm-4:20 pm

1 stop29h 35m

$675

Quickest round-trip

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Thu 12/10

9:45 pm-10:00 am

Nonstop7h 15m

London Heathrow

Thu 12/17

12:15 pm-6:30 pm

1 stop11h 15m

$678

Washington, D.C.London

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

DCALHR

Washington, D.C. Reagan-National

Wed 12/9

11:05 am-8:05 pm

3 stops28h 00m

London Heathrow

Sat 12/12

7:55 pm-9:59 pm

3 stops31h 04m

$681

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Wed 3/3

8:30 pm-4:00 pm

1 stop14h 30m

London Heathrow

Mon 3/15

10:20 am-6:15 pm

1 stop11h 55m

$682

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Tue 11/17

5:25 pm-9:35 pm

1 stop23h 10m

London Heathrow

Wed 11/25

6:30 pm-3:15 pm

1 stop25h 45m

$696

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 $695 to $1,003.
The lowest price recently found on this route was $673.

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 $698. 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 $939. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $1,041.

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 $982. 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 $997.

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 $923 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 9% 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	$275
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 $275. The best round-trip flight deal from Washington, D.C. to London Heathrow Airport found on momondo in the last 72 hours is $673.

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 48.87% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 10.33%, Airbus A330-900neo at 6.97%, and Boeing 777-300ER at 6.82%.
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 17%, 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 $424	Free Cancellation	Rating 7.2 2,386 reviews	Search TAP AIR PORTUGAL flights
Virgin Atlantic	PriceFrom $432	Free Cancellation	Rating 7.5 697 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $450	Free Cancellation	Rating 7.8 8,681 reviews	Search Delta flights
United Airlines	PriceFrom $462	Free Cancellation	Rating 7.3 10,441 reviews	Search United Airlines flights
Icelandair	PriceFrom $475	Free Cancellation	Rating 7.0 766 reviews	Search Icelandair flights
Scandinavian Airlines	PriceFrom $496	Free Cancellation	Rating 7.4 2,027 reviews	Search Scandinavian Airlines flights
Iberia	PriceFrom $500	Free Cancellation	Rating 7.0 3,244 reviews	Search Iberia flights
Air France	PriceFrom $581	Free Cancellation	Rating 7.5 1,652 reviews	Search Air France flights
Finnair	PriceFrom $591	Free Cancellation	Rating 7.6 1,416 reviews	Search Finnair flights
SWISS	PriceFrom $593	Free Cancellation	Rating 7.5 2,114 reviews	Search SWISS 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 3 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 8,681 Delta reviews on momondo, the average score is 7.8/10. Delta flies from Washington, D.C. to London Heathrow Airport about 3 times each week, with ticket deals ranging from $450 to $1,001. 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 $378

Flights to London Stansted Airportfrom $379

Flights to London City Airportfrom $659

Flights to London Luton Airportfrom $391

Flights to Glasgow Intl Airportfrom $511

Flights to Belfast City Airportfrom $749

Flights to Belfast Intl Airportfrom $749

Flights to London Southend Airportfrom $660

Cheap flights from Washington, D.C. to London from $275

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 1/11. 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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JetBlue flights from Washington, D.C. to London Heathrow Airport

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

Icelandair flights from Washington, D.C. to London Heathrow Airport

Our best Icelandair 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.

Find better results for your trip to London

Popular cities in the United Kingdom

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