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

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

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

Flights via New York (JFK) offer the lowest average round-trip price of $570.

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

As of August 2026, there are 188 flights per week flying from Washington, D.C. to London Heathrow Airport. The most common day of the week flights depart is Wed, with 16% of flights taking off on this day.

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

Reykjavik (KEF) was the most common stop: 38% 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?

Icelandair, KLM, and JetBlue 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 day?

26 flights are operational daily from Washington, D.C. to London Heathrow Airport as of August 2026. The most popular departure time for this route is 10:00PM, with 84% 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 at night tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

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.

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 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 12m.

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

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 9h 42m.

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 176 minutes.

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 August 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.

$274 Cheap Flights from Washington, D.C. to London Heathrow Airport in 2026

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.

6:25 pm - 11:25 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

13h 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

$624TAP AIR PORTUGAL

Thu, Oct 29 - Thu, Nov 5

6:25 pm - 11:25 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

13h 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

$624TAP AIR PORTUGAL

Thu, Oct 29 - Mon, Nov 9

8:20 pm - 1:35 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

12h 15m1 stop Kastrup Copenhagen

6:40 am - 5:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

15h 20m2 stops Stockholm Arlanda Kastrup Copenhagen

$626Scandinavian Airlines

Fri, Oct 2 - Sun, Oct 4

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

39h 40m2 stops Kastrup Copenhagen Stockholm Arlanda

6:40 am - 5:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

15h 20m1 stop Kastrup Copenhagen

$627Scandinavian Airlines

Mon, Sep 28 - Thu, Oct 1

8:30 pm - 11:55 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

10h 25m1 stop Reykjavik Keflavik Intl

9:25 pm - 10:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

29h 50m1 stop Reykjavik Keflavik Intl

$645Icelandair

Sun, Sep 20 - Tue, Sep 29

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

$646Icelandair

Fri, Feb 12 - Sun, Feb 21

7:40 pm - 6:30 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

17h 50m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen

6:40 am - 6:30 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

16h 50m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl

$678Multiple Airlines

Tue, Nov 10 - Sun, Nov 15

7:40 pm - 6:30 pmBWI Baltimore/Washington-LHR London Heathrow

17h 50m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen

6:40 am - 6:40 pmLHR London Heathrow-BWI Baltimore/Washington

17h 00m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl

$679Multiple Airlines

Wed, Nov 18 - Sun, Nov 22

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

$696British Airways

Wed, Nov 25 - Wed, Dec 2

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

$741British Airways

Wed, Dec 2 - Sun, Dec 6

Cheap last minute flights

Enter your travel dates to find the best prices.

11:20 pm - 8:20 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

16h 00m1 stop Reykjavik Keflavik Intl

9:25 pm - 7:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 55m1 stop Reykjavik Keflavik Intl

$863Icelandair

Tue, Sep 1 - Thu, Oct 15

12:29 pm - 9:35 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

16h 06m2 stops New York John F Kennedy Intl Oslo Gardermoen

9:05 pm - 5:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

24h 55m2 stops Stockholm Arlanda Kastrup Copenhagen

$867Scandinavian Airlines

Tue, Sep 1 - Thu, Oct 15

8:30 pm - 8:20 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

18h 50m1 stop Reykjavik Keflavik Intl

9:25 pm - 7:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 55m1 stop Reykjavik Keflavik Intl

$870Icelandair

Tue, Sep 1 - Mon, Sep 21

12:29 pm - 4:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

22h 31m2 stops New York John F Kennedy Intl Kastrup Copenhagen

9:05 pm - 5:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

24h 55m2 stops Stockholm Arlanda Kastrup Copenhagen

$884Scandinavian Airlines

Tue, Sep 1 - Thu, Oct 15

8:30 pm - 7:55 pmBWI Baltimore/Washington-LHR London Heathrow

18h 25m3 stops Reykjavik Keflavik Intl Oslo Gardermoen Stockholm Arlanda

7:05 am - 7:25 pmLHR London Heathrow-BWI Baltimore/Washington

17h 20m2 stops Oslo Gardermoen Reykjavik Keflavik Intl

$975Multiple Airlines

Mon, Aug 31 - Tue, Sep 15

3:25 pm - 7:40 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

11h 15m1 stop Frankfurt am Main

8:40 am - 4:45 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 05m1 stop Zurich

$976Multiple Airlines

Sun, Aug 30 - Fri, Sep 18

6:10 am - 8:45 pmDCA Washington, D.C. Reagan-National-LHR London Heathrow

9h 35m1 stop New York John F Kennedy Intl

11:55 am - 10:59 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

16h 04m1 stop New York John F Kennedy Intl

$979JetBlue

Fri, Aug 28 - Fri, Sep 11

10:35 pm - 10:20 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

30h 45m1 stop Lisbon Humberto Delgado

7:50 pm - 3:10 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

24h 20m1 stop Lisbon Humberto Delgado

$985TAP AIR PORTUGAL

Mon, Aug 31 - Tue, Sep 15

10:35 pm - 10:20 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

30h 45m1 stop Lisbon Humberto Delgado

6:00 am - 3:10 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

14h 10m1 stop Lisbon Humberto Delgado

$986TAP AIR PORTUGAL

Mon, Aug 31 - Thu, Sep 17

6:10 am - 8:45 pmDCA Washington, D.C. Reagan-National-LHR London Heathrow

9h 35m1 stop New York John F Kennedy Intl

8:15 am - 10:59 pmLHR London Heathrow-DCA Washington, D.C. Reagan-National

19h 44m1 stop New York John F Kennedy Intl

$1,001JetBlue

Fri, Aug 28 - Sun, Aug 30

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

$696British Airways

Wed, Nov 25 - Wed, Dec 2

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

$741British Airways

Wed, Dec 2 - Sun, Dec 6

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

7h 25mnonstop

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

8h 30mnonstop

$759Multiple Airlines

Wed, Jan 27 - Sun, Jan 31

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

$770Multiple Airlines

Wed, Dec 2 - Sun, Dec 6

9:45 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

$824Iberia

Tue, Dec 1 - Sun, Dec 6

10:05 pm - 10:40 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mnonstop

3:50 pm - 7:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mnonstop

$839Virgin Atlantic

Mon, Sep 28 - Wed, Oct 7

10:05 pm - 10:40 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mnonstop

3:50 pm - 7:15 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 25mnonstop

$839Virgin Atlantic

Mon, Sep 28 - Wed, Oct 14

5:45 pm - 6:20 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 35mnonstop

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

8h 15mnonstop

$839Finnair

Mon, Sep 21 - Tue, Sep 29

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

7h 15mnonstop

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

8h 25mnonstop

$850Finnair

Tue, Nov 3 - Tue, Nov 10

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

7h 15mnonstop

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

8h 25mnonstop

$856Iberia

Sun, Oct 25 - Wed, Nov 4

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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 8

DCA11:05 amWashington, D.C. Reagan-National

15h 05m

1 stop

LHR7:10 amLondon Heathrow

Feb 10

LHR6:50 amLondon Heathrow

13h 34m

2 stops

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

$744

Air Canada

Sep 28

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

12h 35m

1 stop

LHR6:30 amLondon Heathrow

Oct 7

LHR2:05 pmLondon Heathrow

12h 45m

1 stop

DCA9:50 pmWashington, D.C. Reagan-National

$822

Air Canada

Sep 28

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

12h 40m

2 stops

LHR6:35 amLondon Heathrow

Oct 14

LHR2:05 pmLondon Heathrow

12h 45m

1 stop

DCA9:50 pmWashington, D.C. Reagan-National

$840

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

Feb 12

IAD7:40 pmWashington, D.C. Dulles Intl

18h 50m

1 stop

LHR7:30 pmLondon Heathrow

Feb 21

LHR8:35 pmLondon Heathrow

26h 55m

1 stop

IAD6:30 pmWashington, D.C. Dulles Intl

$646

Icelandair

Dec 11

IAD7:40 pmWashington, D.C. Dulles Intl

10h 10m

1 stop

LHR10:50 amLondon Heathrow

Jan 15

LHR12:15 pmLondon Heathrow

11h 15m

1 stop

IAD6:30 pmWashington, D.C. Dulles Intl

$653

Icelandair

Jan 13

IAD7:40 pmWashington, D.C. Dulles Intl

18h 50m

1 stop

LHR7:30 pmLondon Heathrow

Jan 20

LHR12:15 pmLondon Heathrow

11h 15m

1 stop

IAD6:30 pmWashington, D.C. Dulles Intl

$658

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

Thu 10/29

6:25 pm-11:25 am

1 stop13h 00m

London Heathrow

Thu 11/5

6:00 am-3:15 pm

1 stop14h 15m

$624

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Thu 10/29

6:25 pm-11:25 am

1 stop13h 00m

London Heathrow

Mon 11/9

6:00 am-3:15 pm

1 stop14h 15m

$624

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Fri 10/2

8:20 pm-1:35 pm

1 stop12h 15m

London Heathrow

Sun 10/4

6:40 am-5:00 pm

2 stops15h 20m

$626

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Mon 9/28

8:20 pm-5:00 pm

2 stops39h 40m

London Heathrow

Thu 10/1

6:40 am-5:00 pm

1 stop15h 20m

$627

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Sun 9/20

8:30 pm-11:55 am

1 stop10h 25m

London Heathrow

Tue 9/29

9:25 pm-10:15 pm

1 stop29h 50m

$645

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Fri 2/12

7:40 pm-7:30 pm

1 stop18h 50m

London Heathrow

Sun 2/21

8:35 pm-6:30 pm

1 stop26h 55m

$646

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Tue 11/10

7:40 pm-6:30 pm

2 stops17h 50m

London Heathrow

Sun 11/15

6:40 am-6:30 pm

2 stops16h 50m

$678

BaltimoreLondon

BWI Baltimore/Washington - LHR London Heathrow

BWILHR

Baltimore/Washington

Wed 11/18

7:40 pm-6:30 pm

2 stops17h 50m

London Heathrow

Sun 11/22

6:40 am-6:40 pm

2 stops17h 00m

$679

Quickest round-trip

BaltimoreLondon

BWI Baltimore/Washington - LHR London Heathrow

BWILHR

Baltimore/Washington

Wed 11/25

6:55 pm-7:05 am

Nonstop7h 10m

London Heathrow

Wed 12/2

1:50 pm-5:05 pm

Nonstop8h 15m

$696

BaltimoreLondon

BWI Baltimore/Washington - LHR London Heathrow

BWILHR

Baltimore/Washington

Wed 12/2

6:55 pm-7:05 am

Nonstop7h 10m

London Heathrow

Sun 12/6

1:50 pm-5:05 pm

Nonstop8h 15m

$741

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 $708 to $1,074.
The lowest price recently found on this route was $624.

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 $685. 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 $737.

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 $893. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $997.

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 $919. 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 $965.

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 $885 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 $848 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 6% 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 August 2026, prices for Washington, D.C. to London Heathrow Airport flights are approximately 4% 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	$274
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 $274. The best round-trip flight deal from Washington, D.C. to London Heathrow Airport found on momondo in the last 72 hours is $624.

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.

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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 August 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 55.47% of all bookings. The subsequent popular models are Boeing 777-300ER at 13.15%, Boeing 787-9 Dreamliner at 6.20%, and Airbus A330-900neo at 4.90%.
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 8%.

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 $420	Free Cancellation	Rating 7.2 2,377 reviews	Search TAP AIR PORTUGAL flights
Virgin Atlantic	PriceFrom $449	Free Cancellation	Rating 7.4 695 reviews	Search Virgin Atlantic flights
United Airlines	PriceFrom $462	Free Cancellation	Rating 7.4 10,134 reviews	Search United Airlines flights
Icelandair	PriceFrom $479	Free Cancellation	Rating 6.9 738 reviews	Search Icelandair flights
Iberia	PriceFrom $484	Free Cancellation	Rating 7.0 3,257 reviews	Search Iberia flights
Delta	PriceFrom $530	Free Cancellation	Rating 7.8 8,530 reviews	Search Delta flights
Scandinavian Airlines	PriceFrom $560	Free Cancellation	Rating 7.4 1,964 reviews	Search Scandinavian Airlines flights
Air Canada	PriceFrom $577	Free Cancellation	Rating 7.1 11,545 reviews	Search Air Canada flights
Air France	PriceFrom $581	Free Cancellation	Rating 7.5 1,645 reviews	Search Air France flights
SWISS	PriceFrom $593	Free Cancellation	Rating 7.5 2,058 reviews	Search SWISS flights

Delta Flights From Washington, D.C. to London Heathrow Airport
Delta flight deals from Washington, D.C. to London Heathrow Airport start from $530 round-trip. Over the 5 Delta flights for this route in a normal week, average airfare is usually $957 round-trip - but some users have found much cheaper deals with momondo.
KLM Flights From Washington, D.C. to London Heathrow Airport
Across 1,565 KLM reviews on momondo, the average score is 7.8/10. KLM flies from Washington, D.C. to London Heathrow Airport about 5 times each week, with ticket deals ranging from $618 to $1,157. 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.

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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 $405

Flights to London Stansted Airportfrom $518

Flights to London City Airportfrom $722

Flights to London Luton Airportfrom $518

Flights to Glasgow Intl Airportfrom $528

Flights to Belfast Intl Airportfrom $599

Flights to London Southend Airportfrom $651

Flights to Belfast City Airportfrom $599

Cheap flights from Washington, D.C. to London from $274

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 10/13. 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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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

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

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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

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