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

174 flights are operational weekly from London Heathrow Airport to Washington, D.C. as of March 2026. The most popular departure day for this route is Fri, with 18% of flights per week taking off on this day.

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

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

Austrian Airlines, United Airlines, and Lufthansa are the most popular carriers operating from London Heathrow to Washington, D.C.

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

Saturday 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.

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

Dublin (DUB) was the most common stop: 60% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Copenhagen (CPH) offer the lowest average round-trip price of $575.

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

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 11h 15m.

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

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

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

Historically, on average around 17% of flights between London and Washington, D.C. have experienced a delay on any given week. The average delay length over the past 12 months has been 130 minutes.

What airlines fly to Washington, D.C.?

British Airways, Delta and United Airlines are the top three most popular airlines that fly to Washington, D.C. from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 12 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

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

According to our data, Virgin Atlantic have had the least number of delays on this route over the last 12 months; with about 10% of their flights experiencing any sort of delay.

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

24 flights are operational daily from London Heathrow Airport to Washington, D.C. as of March 2026. The most popular departure time for this route is 4:00PM, with 100% of flights per day taking off in the afternoon.

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

As of March 2026, there are 12 operators available to choose from for flights from London Heathrow Airport to Washington, D.C..

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Washington, D.C..

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

The necessary travel and health documents for your Washington, D.C. trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$423 Cheap Flights from London Heathrow Airport to Washington, D.C. in 2026

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

Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:40 am - 5:46 pm

LHR

DCA

14h 06m

1 stop

6:00 am - 8:45 pm

DCA

LHR

9h 45m

1 stop

$550JetBlue

Wed, Apr 22 - Sat, Apr 25

5:05 pm - 8:20 pm

LHR

IAD

8h 15mnonstop

7:15 pm - 7:45 am

IAD

LHR

7h 30mnonstop

$552British Airways

Fri, Jun 5 - Sat, Jun 13

5:05 pm - 8:20 pm

LHR

IAD

8h 15mnonstop

7:15 pm - 7:45 am

IAD

LHR

7h 30mnonstop

$553British Airways

Fri, Aug 21 - Mon, Aug 31

6:00 am - 2:35 pm

LHR

IAD

13h 35m

1 stop

6:25 pm - 6:55 am

IAD

LHR

7h 30mnonstop

$555Multiple Airlines

Tue, Apr 28 - Mon, May 4

9:15 am - 4:30 pm

LHR

IAD

12h 15m

1 stop

5:20 pm - 12:50 pm

IAD

LHR

14h 30m

1 stop

$557American Airlines

Sat, Aug 22 - Wed, Sep 2

1:00 pm - 9:26 pm

LHR

DCA

13h 26m

1 stop

1:49 pm - 9:05 am

DCA

LHR

14h 16m

1 stop

$557American Airlines

Fri, Aug 21 - Mon, Aug 31

1:05 pm - 7:20 pm

LHR

IAD

11h 15m

1 stop

8:30 pm - 8:20 pm

IAD

LHR

18h 50m

1 stop

$558Icelandair

Wed, Apr 15 - Sun, Apr 19

4:00 pm - 11:25 pm

LHR

IAD

12h 25m

1 stop

5:41 pm - 10:25 am

IAD

LHR

11h 44m

1 stop

$566United Airlines

Tue, Mar 31 - Mon, Apr 13

8:40 am - 4:45 pm

LHR

IAD

13h 05m

1 stop

5:26 pm - 11:55 am

IAD

LHR

13h 29m

1 stop

$573Multiple Airlines

Mon, Apr 13 - Sun, Apr 19

12:15 pm - 3:30 pm

LHR

IAD

8h 15mnonstop

6:15 am - 9:35 pm

IAD

LHR

10h 20m

1 stop

$574United Airlines

Fri, Aug 21 - Mon, Aug 31

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

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

Lufthansa

Apr 21

LHR9:00 amLondon Heathrow

15h 25m

1 stop

IAD7:25 pmWashington, D.C. Dulles Intl

Apr 26

IAD10:10 pmWashington, D.C. Dulles Intl

7h 30m

LHR10:40 amLondon Heathrow

$576

Lufthansa

Apr 17

LHR7:25 amLondon Heathrow

17h 00m

1 stop

IAD7:25 pmWashington, D.C. Dulles Intl

Apr 19

IAD10:10 pmWashington, D.C. Dulles Intl

7h 30m

LHR10:40 amLondon Heathrow

$580

Lufthansa

May 3

LHR6:30 amLondon Heathrow

14h 35m

1 stop

IAD4:05 pmWashington, D.C. Dulles Intl

May 9

IAD6:25 pmWashington, D.C. Dulles Intl

7h 30m

LHR6:55 amLondon Heathrow

$592

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

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

Austrian Airlines

Apr 14

LHR6:00 amLondon Heathrow

13h 35m

1 stop

IAD2:35 pmWashington, D.C. Dulles Intl

Apr 19

IAD10:10 pmWashington, D.C. Dulles Intl

7h 30m

LHR10:40 amLondon Heathrow

$582

Austrian Airlines

Apr 18

LHR7:30 pmLondon Heathrow

24h 05m

1 stop

IAD2:35 pmWashington, D.C. Dulles Intl

May 2

IAD6:25 pmWashington, D.C. Dulles Intl

7h 30m

LHR6:55 amLondon Heathrow

$586

Austrian Airlines

Apr 16

LHR6:00 amLondon Heathrow

13h 35m

1 stop

IAD2:35 pmWashington, D.C. Dulles Intl

Apr 19

IAD10:10 pmWashington, D.C. Dulles Intl

7h 30m

LHR10:40 amLondon Heathrow

$587

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 4/22

8:40 am-5:46 pm

1 stop14h 06m

Washington, D.C. Reagan-National

Sat 4/25

6:00 am-8:45 pm

1 stop9h 45m

$550

Quickest round-trip

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 6/5

5:05 pm-8:20 pm

Nonstop8h 15m

Washington, D.C. Dulles Intl

Sat 6/13

7:15 pm-7:45 am

Nonstop7h 30m

$552

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 8/21

5:05 pm-8:20 pm

Nonstop8h 15m

Washington, D.C. Dulles Intl

Mon 8/31

7:15 pm-7:45 am

Nonstop7h 30m

$553

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 4/28

6:00 am-2:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

Mon 5/4

6:25 pm-6:55 am

Nonstop7h 30m

$555

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 8/22

9:15 am-4:30 pm

1 stop12h 15m

Washington, D.C. Dulles Intl

Wed 9/2

5:20 pm-12:50 pm

1 stop14h 30m

$557

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Fri 8/21

1:00 pm-9:26 pm

1 stop13h 26m

Washington, D.C. Reagan-National

Mon 8/31

1:49 pm-9:05 am

1 stop14h 16m

$557

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 4/15

1:05 pm-7:20 pm

1 stop11h 15m

Washington, D.C. Dulles Intl

Sun 4/19

8:30 pm-8:20 pm

1 stop18h 50m

$558

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 3/31

4:00 pm-11:25 pm

1 stop12h 25m

Washington, D.C. Dulles Intl

Mon 4/13

5:41 pm-10:25 am

1 stop11h 44m

$566

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 4/13

8:40 am-4:45 pm

1 stop13h 05m

Washington, D.C. Dulles Intl

Sun 4/19

5:26 pm-11:55 am

1 stop13h 29m

$573

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 8/21

12:15 pm-3:30 pm

Nonstop8h 15m

Washington, D.C. Dulles Intl

Mon 8/31

6:15 am-9:35 pm

1 stop10h 20m

$574

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 London Heathrow Airport to Washington, D.C.

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Delays

Layovers

Other information

What is the cheapest month to fly to Washington, D.C.?

The month of January is, on average, the cheapest month to fly to Washington, D.C. from London Heathrow Airport, with most prices found around $613. If you’re not able to fly to Washington, D.C. in January, then September is your next best option. Flight prices from London Heathrow Airport to Washington, D.C. during September average around $637.

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

On average, the least expensive day to fly to Washington, D.C. from London Heathrow Airport is on a Thursday. momondo users have found tickets for Thursday departures for as low as $748. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Washington, D.C. for around $900.

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

In the afternoon is the cheapest time of day to fly from London Heathrow Airport to Washington, D.C. when you can find flight prices for as low as $806. Flying to Washington, D.C. in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $841. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

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

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

You are more likely to see cheaper flights to Washington, D.C. from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $740 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from London Heathrow Airport for as low as $691 on momondo.

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

There are 4 cabin classes available to choose from on London Heathrow to Washington, D.C. flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London Heathrow Airport to Washington, D.C. flights?

You could potentially save up to 4% on your flight if you consider stops on a London Heathrow Airport to Washington, D.C. flight.

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

As of March 2026, prices for London Heathrow Airport to Washington, D.C. flights are approximately 17% cheaper when compared to flights at the same time last year.

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

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Washington, D.C. according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap London Heathrow Airport to Washington, D.C. (LHR to WAS) flight deals and tips

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

Best Price Found	$628
Fastest flight time	8h 00m
Direct flights	Every day
Airports in Washington, D.C.	2 airports

The best one-way flight to Washington, D.C. from London Heathrow Airport in the past 72 hours is $628. The best round-trip flight deal from London Heathrow Airport to Washington, D.C. found on momondo in the last 72 hours is $651.

The fastest flight from London Heathrow Airport to Washington, D.C. takes 8h 00m

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

There are 2 airports in Washington, D.C.. From London Heathrow Airport there are direct flights to Washington, D.C. Dulles Intl (IAD).

Search flight deals

How far is London Heathrow to Washington, D.C. by plane?
The distance between London Heathrow and Washington, D.C. is about 3649.4 mi. A reasonable flight in good conditions will take 8h 00m.
When did momondo last update prices for flights from London Heathrow Airport to Washington, D.C.?
Prices for flights from London Heathrow Airport to Washington, D.C. are updated daily.
How many operators does momondo search for flights from London Heathrow Airport to Washington, D.C.?
As of March 2026, there are 12 operators available to choose from for flights from London Heathrow Airport to Washington, D.C..
How old do you have to be to fly from London Heathrow Airport to Washington, D.C.?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Washington, D.C..
What documentation or ID do you need to fly to Washington, D.C.?
The necessary travel and health documents for your Washington, D.C. trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from London Heathrow Airport to Washington, D.C.?
momondo data reveals that the most frequently booked plane model on the route from London Heathrow Airport to Washington, D.C. is Boeing 777, representing 37.21% of all bookings. The subsequent popular models are Boeing 787-9 Dreamliner at 17.21%, Boeing 777-300ER at 11.56%, and Airbus A350-1000 at 6.88%.
What is the most popular airline from London Heathrow Airport to Washington, D.C.?
momondo data reveals that the most frequently booked airline on the route from London Heathrow Airport to Washington, D.C. is British Airways, representing 36% of all bookings. The subsequent popular airlines are United Airlines at 15%, American Airlines at 12%, and Delta at 12%.

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

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

Airline	Rating	Free Cancellation	Price
Scandinavian Airlines	PriceFrom $271	Free Cancellation	Rating 7.3 1,720 reviews	Search Scandinavian Airlines flights
Delta	PriceFrom $320	Free Cancellation	Rating 7.9 8,315 reviews	Search Delta flights
Austrian Airlines	PriceFrom $431	Free Cancellation	Rating 7.6 900 reviews	Search Austrian Airlines flights
Icelandair	PriceFrom $466	Free Cancellation	Rating 7.0 625 reviews	Search Icelandair flights
TAP AIR PORTUGAL	PriceFrom $473	Free Cancellation	Rating 7.1 2,170 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $556	Free Cancellation	Rating 6.8 7,861 reviews	Search Lufthansa flights
American Airlines	PriceFrom $559	Free Cancellation	Rating 7.1 11,489 reviews	Search American Airlines flights
United Airlines	PriceFrom $567	Free Cancellation	Rating 7.4 9,453 reviews	Search United Airlines flights
British Airways	PriceFrom $571	Free Cancellation	Rating 6.7 7,806 reviews	Search British Airways flights
Air Canada	PriceFrom $635	Free Cancellation	Rating 7.1 10,828 reviews	Search Air Canada flights

Delta Flights From London Heathrow Airport to Washington, D.C.
Delta flies from London Heathrow Airport to Washington, D.C. around 4 times per week, with 8,315 momondo users rating the airline 7.9/10. The cheapest Delta deal from London Heathrow Airport to Washington, D.C. in the last 72 hours was $320 (round-trip), much lower than the average airfare cost of $949 for Delta flights on this route.
Austrian Airlines Flights From London Heathrow Airport to Washington, D.C.
Across 900 Austrian Airlines reviews on momondo, the average score is 7.6/10. Austrian Airlines flies from London Heathrow Airport to Washington, D.C. about 14 times each week, with ticket deals ranging from $431 to $771. Price data is based on momondo searches in the last 72 hours.

Alexandria

National Harbor

Gettysburg

Arlington

Waldorf

Woodbridge

Colonial Beach

Laurel

Towson

Gaithersburg

Silver Spring

Fredericksburg

Rockville

Tysons

Manassas

Springfield

Linthicum Heights

Bethesda

Fairfax

Reston

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Washington, D.C. for you.

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

Yes. momondo enables you to select and highlight flights to Washington, D.C. from London with this policy.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington, D.C. from London.

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

Yes momondo offers price alerts on flights to Washington, D.C. from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Cheap flights from London Heathrow Airport to Washington, D.C. from $448

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

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

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

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

momondo Fare Finder

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See travel insights to Washington, D.C. from

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

What is the cheapest month to fly to Washington, D.C.?

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

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

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

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

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

Can stopping save me money on London Heathrow Airport to Washington, D.C. flights?

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

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

What airlines fly to Washington, D.C.?

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

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

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

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

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

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

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

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

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

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

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

Cheap London Heathrow Airport to Washington, D.C. (LHR to WAS) flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Washington, D.C.

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

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

Delta Flights From London Heathrow Airport to Washington, D.C.

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

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Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.

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Cabin classes currently available on flights to Washington, D.C.

List of cabin classes available on flights landing in Washington, D.C.. Availability may vary depending on flight origin and airline.

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