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 travel time from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?

Flights connecting via Dublin (DUB) have the shortest average one-way travel time: 9h 57m.

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

Zurich (ZRH) has the shortest average layover time for this route: 1h 23m.

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.

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. Dulles Intl Airport according to our data. British Airways is the first choice among our users, with 47% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 16 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

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.

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

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

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

Flights via Reykjavik (KEF) offer the lowest average round-trip price of $654.

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

Copenhagen (CPH) was the most common stop: 25% of momondo users choosing 1-stop flights on this route connected there.

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

As of August 2026, there are 16 operators available to choose from for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport.

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

The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$322 Cheap Flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport in 2026

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

As of August 2026, 167 flights take off from Washington, D.C. Dulles Intl Airport and land in London Heathrow Airport each week. The most common flight departure day for this route is Mon, with 17% of weekly flights taking off on this day.

Discover deals from 900+ travel sites with momondo.

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

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:35 pm - 10:55 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

19h 20m1 stop Lisbon Humberto Delgado

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

24h 20m1 stop Lisbon Humberto Delgado

$622TAP AIR PORTUGAL

Tue, Oct 6 - Tue, Oct 13

8:20 pm - 4:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 40m1 stop Kastrup Copenhagen

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

15h 20m1 stop Kastrup Copenhagen

$622Scandinavian Airlines

Sat, Oct 10 - Mon, Oct 19

8:20 pm - 4:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 40m1 stop Kastrup Copenhagen

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

15h 20m1 stop Kastrup Copenhagen

$622Scandinavian Airlines

Fri, Oct 9 - Mon, Oct 19

6:25 pm - 12:40 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 15m1 stop Lisbon Humberto Delgado

7:55 pm - 8:35 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

29h 40m1 stop Lisbon Humberto Delgado

$623TAP AIR PORTUGAL

Thu, Oct 29 - Thu, Nov 5

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

$635Icelandair

Fri, Nov 20 - Mon, Nov 23

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 - 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 - 9:40 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

21h 00m2 stops Reykjavik Keflavik Intl Kastrup Copenhagen

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

28h 50m2 stops Kastrup Copenhagen Reykjavik Keflavik Intl

$680Multiple Airlines

Tue, Nov 10 - Fri, Nov 13

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

7h 10mnonstop

6:15 am - 4:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

15h 05m1 stop Madrid Barajas

$689Iberia

Mon, Nov 23 - Wed, Nov 25

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

7h 10mnonstop

6:15 am - 4:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

15h 05m1 stop Madrid Barajas

$689Iberia

Tue, Nov 24 - Thu, Nov 26

Cheap last minute flights

Enter your travel dates to find the best prices.

5:45 pm - 10:20 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

11h 35m1 stop Lisbon Humberto Delgado

8:00 am - 8:35 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

17h 35m1 stop Lisbon Humberto Delgado

$846TAP AIR PORTUGAL

Wed, Aug 26 - Thu, Sep 3

5:45 pm - 10:20 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

11h 35m1 stop Lisbon Humberto Delgado

11:20 am - 3:10 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

32h 50m1 stop Lisbon Humberto Delgado

$863TAP AIR PORTUGAL

Wed, Aug 26 - Wed, Sep 2

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

18h 50m1 stop Reykjavik Keflavik Intl

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

29h 50m1 stop Reykjavik Keflavik Intl

$953Icelandair

Wed, Aug 26 - Mon, Aug 31

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

$953Icelandair

Wed, Aug 26 - Wed, Sep 2

8:20 pm - 4:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 40m1 stop Kastrup Copenhagen

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

15h 20m1 stop Kastrup Copenhagen

$965Scandinavian Airlines

Sat, Aug 29 - Wed, Sep 2

8:20 pm - 4:00 pmIAD Washington, D.C. Dulles Intl-LHR London Heathrow

14h 40m1 stop Kastrup Copenhagen

7:30 pm - 5:00 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

26h 30m1 stop Kastrup Copenhagen

$965Scandinavian Airlines

Fri, Aug 28 - Fri, Sep 4

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

$968Multiple Airlines

Wed, Aug 26 - Wed, Sep 9

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

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

11h 15m1 stop Frankfurt am Main

10:50 am - 7:25 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

13h 35m1 stop Munich Franz Josef Strauss

$990Lufthansa

Sun, Aug 30 - Wed, Sep 9

6:30 pm - 6:55 amIAD Washington, D.C. Dulles Intl-LHR London Heathrow

7h 25mnonstop

6:50 am - 2:20 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

12h 30m1 stop Brussels Bruxelles-National

$1,002Lufthansa

Wed, Aug 26 - Wed, Sep 2

Cheap direct flights

Enter your travel dates to find the best prices.

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

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

8h 25mnonstop

$786British Airways

Thu, Nov 19 - Mon, Nov 23

6:05 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

$801British Airways

Wed, Jan 27 - Sun, Jan 31

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

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

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

$839Air France

Tue, Oct 6 - Tue, Oct 13

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

$840Air France

Wed, Oct 7 - Wed, Oct 14

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

7h 35mnonstop

4:25 pm - 8:55 pmLHR London Heathrow-IAD Washington, D.C. Dulles Intl

8h 30mnonstop

$850Finnair

Wed, Oct 21 - Wed, Oct 28

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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Scandinavian Airlines flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport

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

Scandinavian Airlines

Oct 2

IAD8:20 pmWashington, D.C. Dulles Intl

12h 15m

1 stop

LHR1:35 pmLondon Heathrow

Oct 4

LHR6:40 amLondon Heathrow

15h 20m

2 stops

IAD5:00 pmWashington, D.C. Dulles Intl

$638

Scandinavian Airlines

Jan 16

IAD8:30 pmWashington, D.C. Dulles Intl

15h 30m

2 stops

LHR5:00 pmLondon Heathrow

Jan 17

LHR7:30 pmLondon Heathrow

26h 45m

1 stop

IAD5:15 pmWashington, D.C. Dulles Intl

$647

Scandinavian Airlines

Jan 18

IAD8:30 pmWashington, D.C. Dulles Intl

55h 25m

2 stops

LHR8:55 amLondon Heathrow

Jan 22

LHR7:05 amLondon Heathrow

40h 45m

2 stops

IAD6:50 pmWashington, D.C. Dulles Intl

$651

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

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

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

Feb 4

IAD7:40 pmWashington, D.C. Dulles Intl

10h 10m

1 stop

LHR10:50 amLondon Heathrow

Feb 8

LHR12:15 pmLondon Heathrow

11h 15m

1 stop

IAD6:30 pmWashington, D.C. Dulles Intl

$654

Icelandair

Jan 17

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

$657

momondo Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport 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

Tue 10/6

10:35 pm-10:55 pm

1 stop19h 20m

London Heathrow

Tue 10/13

7:50 pm-3:10 pm

1 stop24h 20m

$622

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Sat 10/10

8:20 pm-4:00 pm

1 stop14h 40m

London Heathrow

Mon 10/19

6:40 am-5:00 pm

1 stop15h 20m

$622

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Fri 10/9

8:20 pm-4:00 pm

1 stop14h 40m

London Heathrow

Mon 10/19

6:40 am-5:00 pm

1 stop15h 20m

$622

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-12:40 pm

1 stop14h 15m

London Heathrow

Thu 11/5

7:55 pm-8:35 pm

1 stop29h 40m

$623

Quickest round-trip

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Fri 11/20

7:40 pm-10:50 am

1 stop10h 10m

London Heathrow

Mon 11/23

12:15 pm-6:30 pm

1 stop11h 15m

$635

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

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

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-9:40 pm

2 stops21h 00m

London Heathrow

Fri 11/13

6:40 pm-6:30 pm

2 stops28h 50m

$680

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Mon 11/23

6:05 pm-6:15 am

Nonstop7h 10m

London Heathrow

Wed 11/25

6:15 am-4:20 pm

1 stop15h 05m

$689

Washington, D.C.London

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

IADLHR

Washington, D.C. Dulles Intl

Tue 11/24

6:05 pm-6:15 am

Nonstop7h 10m

London Heathrow

Thu 11/26

6:15 am-4:20 pm

1 stop15h 05m

$689

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. Dulles Intl Airport 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. Dulles Intl Airport and London Heathrow Airport?

Prices are currently low for flights on this route.

Typical prices usually range from $757 to $1,081.
The lowest price recently found on this route was $622.

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. Dulles Intl Airport, with most prices found around $692. If you’re not able to fly to London Heathrow Airport in February, then November is your next best option. Flight prices from Washington, D.C. Dulles Intl Airport to London Heathrow Airport during November average around $746.

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. Dulles Intl Airport 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. Dulles Intl to London Heathrow flight route?

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

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

You are more likely to see cheaper flights to London Heathrow Airport from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport for as low as $848 on momondo.

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

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl Airport 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.

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

As of August 2026, prices for Washington, D.C. Dulles Intl Airport to London Heathrow Airport flights are approximately 11% cheaper when compared to flights at the same time last year.

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

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

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

Best Price Found	$322
Fastest flight time	7h 10m
Direct flights	Every day

The best one-way flight to London Heathrow Airport from Washington, D.C. Dulles Intl Airport in the past 72 hours is $322. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to London Heathrow Airport found on momondo in the last 72 hours is $622.

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

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

Search flight deals

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

How far is Washington, D.C. Dulles Intl to London Heathrow by plane?
A flight from Washington, D.C. Dulles Intl to London Heathrow will travel around 3664.4 mi. By plane, this route typically takes 7h 10m.
When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Prices for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
As of August 2026, there are 16 operators available to choose from for flights from Washington, D.C. Dulles Intl Airport to London Heathrow Airport.
How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Washington, D.C. Dulles Intl Airport to London Heathrow Airport is Boeing 777 (54.36% of total bookings). The next most popular plane models are Boeing 777-300ER (14.60%), Boeing 787-9 Dreamliner (6.55%), and Airbus A330-900neo (5.00%).
What is the most popular airline from Washington, D.C. Dulles Intl Airport to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. Dulles Intl Airport to London Heathrow Airport is British Airways (35% of total bookings). The next most popular airlines are United Airlines (23%), American Airlines (8%), and Virgin Atlantic (8%).

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

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

Airline	Rating	Free Cancellation	Price
TAP AIR PORTUGAL	PriceFrom $420	Free Cancellation	Rating 7.2 2,375 reviews	Search TAP AIR PORTUGAL flights
Virgin Atlantic	PriceFrom $449	Free Cancellation	Rating 7.4 695 reviews	Search Virgin Atlantic flights
Iberia	PriceFrom $484	Free Cancellation	Rating 7.0 3,257 reviews	Search Iberia flights
Icelandair	PriceFrom $487	Free Cancellation	Rating 6.9 737 reviews	Search Icelandair flights
Delta	PriceFrom $530	Free Cancellation	Rating 7.8 8,529 reviews	Search Delta flights
Scandinavian Airlines	PriceFrom $560	Free Cancellation	Rating 7.4 1,964 reviews	Search Scandinavian Airlines flights
Air France	PriceFrom $581	Free Cancellation	Rating 7.5 1,647 reviews	Search Air France flights
SWISS	PriceFrom $593	Free Cancellation	Rating 7.5 2,055 reviews	Search SWISS flights
British Airways	PriceFrom $601	Free Cancellation	Rating 6.7 8,189 reviews	Search British Airways flights
Aer Lingus	PriceFrom $607	Free Cancellation	Rating 7.3 1,728 reviews	Search Aer Lingus flights

Delta Flights From Washington, D.C. Dulles Intl Airport to London Heathrow Airport
The lowest priced Delta flight from Washington, D.C. Dulles Intl Airport to London Heathrow Airport from the last 72 hours was $530. Generally, Delta has 1 flight on this route every week with an average price of $930. Delta is rated 7.8/10 by our users.
KLM Flights From Washington, D.C. Dulles Intl Airport to London Heathrow Airport
$618 is the best KLM flight deal from Washington, D.C. Dulles Intl Airport to London Heathrow Airport found on momondo over the last 72 hours. The average KLM ticket price found was closer to $1,157, however, with flight time and availability significantly affecting the price. KLM (7.8/10 from 1,565 user reviews) flies into London Heathrow Airport from Washington, D.C. Dulles Intl Airport 1 time in an average week so prices can vary.

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