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

Historically, on average around 18% 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 132 minutes.

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 departing in the morning have, in the past, seen delays more frequently in comparison.

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

The number of flights available between London Heathrow Airport and Washington, D.C. is 28 per day as of December 2025. The most frequent departure time is 16:00, with 100% of daily flights leaving in the afternoon.

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

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

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

As of December 2025, 199 flights take off from London Heathrow Airport and land in Washington, D.C. each week. The most common flight departure day for this route is Wed, with 16% of weekly flights taking off on this day.

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

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

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

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

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 refreshed on a daily basis.

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 stopovers. 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 travel and health documents required for your trip to Washington, D.C. can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Washington, D.C.. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

€485 Cheap Flights from London Heathrow Airport to Washington, D.C. in 2025/26

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16:20 - 20:15LHR-IAD

8h 55mdirect

22:15 - 10:50IAD-LHR

7h 35mdirect

€537United Airlines

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Wed, 24 Dec - Mon, 12 Jan

16:20 - 20:15LHR-IAD

8h 55mdirect

18:20 - 06:40IAD-LHR

7h 20mdirect

€538United Airlines

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Mon, 15 Dec - Wed, 7 Jan

18:40 - 18:50LHR-IAD

29h 10m1 stop

16:50 - 16:00IAD-LHR

18h 10m1 stop

€540Scandinavian Airlines

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Fri, 23 Jan - Mon, 26 Jan

10:25 - 16:00LHR-IAD

34h 35m1 stop

17:17 - 05:55IAD-LHR

31h 38m1 stop

€541Austrian Airlines

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Mon, 15 Dec - Tue, 6 Jan

18:40 - 18:50LHR-IAD

29h 10m1 stop

16:50 - 18:50IAD-LHR

21h 00m2 stops

€544Scandinavian Airlines

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Fri, 23 Jan - Mon, 26 Jan

06:30 - 16:05LHR-IAD

14h 35m1 stop

22:20 - 10:50IAD-LHR

7h 30mdirect

€547Virgin Atlantic

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Sat, 17 Jan - Sat, 24 Jan

16:25 - 19:55LHR-IAD

8h 30mdirect

21:45 - 10:00IAD-LHR

7h 15mdirect

€548British Airways

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Mon, 2 Mar - Sat, 7 Mar

07:05 - 18:15LHR-IAD

15h 10m2 stops

20:20 - 18:50IAD-LHR

17h 30m2 stops

€554Scandinavian Airlines

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Thu, 19 Mar - Wed, 1 Apr

10:00 - 16:05LHR-IAD

11h 05m1 stop

23:20 - 10:50IAD-LHR

7h 30mdirect

€556Delta

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Mon, 2 Mar - Sun, 8 Mar

06:30 - 17:56LHR-BWI

16h 26m2 stops

14:38 - 07:50BWI-LHR

13h 12m1 stop

€561Virgin Atlantic

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Thu, 5 Mar - Mon, 9 Mar

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

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

United Airlines

24 Dec

LHR16:20London Heathrow

8h 55m

IAD20:15Washington, D.C. Dulles Intl

12 Jan

IAD22:15Washington, D.C. Dulles Intl

7h 35m

LHR10:50London Heathrow

€537

Find similar

United Airlines

15 Dec

LHR16:20London Heathrow

8h 55m

IAD20:15Washington, D.C. Dulles Intl

11 Jan

IAD18:20Washington, D.C. Dulles Intl

7h 20m

LHR06:40London Heathrow

€538

Find similar

United Airlines

13 Dec

LHR13:25London Heathrow

12h 34m

1 stop

IAD20:59Washington, D.C. Dulles Intl

7 Jan

IAD18:20Washington, D.C. Dulles Intl

7h 20m

LHR06:40London Heathrow

€540

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

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

Scandinavian Airlines

23 Jan

LHR18:40London Heathrow

29h 10m

1 stop

IAD18:50Washington, D.C. Dulles Intl

26 Jan

IAD16:50Washington, D.C. Dulles Intl

18h 10m

1 stop

LHR16:00London Heathrow

€540

Find similar

Scandinavian Airlines

23 Jan

LHR18:40London Heathrow

29h 10m

1 stop

IAD18:50Washington, D.C. Dulles Intl

26 Jan

IAD16:50Washington, D.C. Dulles Intl

21h 00m

2 stops

LHR18:50London Heathrow

€544

Find similar

Scandinavian Airlines

19 Mar

LHR07:05London Heathrow

15h 10m

2 stops

IAD18:15Washington, D.C. Dulles Intl

1 Apr

IAD20:20Washington, D.C. Dulles Intl

17h 30m

2 stops

LHR18:50London Heathrow

€554

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momondo Fare Finder

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Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 24/12

16:20-20:15

Nonstop8h 55m

Washington, D.C. Dulles Intl

Mon 12/1

22:15-10:50

Nonstop7h 35m

€537

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 15/12

16:20-20:15

Nonstop8h 55m

Washington, D.C. Dulles Intl

Wed 7/1

18:20-06:40

Nonstop7h 20m

€538

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 23/1

18:40-18:50

1 stop29h 10m

Washington, D.C. Dulles Intl

Mon 26/1

16:50-16:00

1 stop18h 10m

€540

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 15/12

10:25-16:00

1 stop34h 35m

Washington, D.C. Dulles Intl

Tue 6/1

17:17-05:55

1 stop31h 38m

€541

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 23/1

18:40-18:50

1 stop29h 10m

Washington, D.C. Dulles Intl

Mon 26/1

16:50-18:50

2 stops21h 00m

€544

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 17/1

06:30-16:05

1 stop14h 35m

Washington, D.C. Dulles Intl

Sat 24/1

22:20-10:50

Nonstop7h 30m

€547

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 2/3

16:25-19:55

Nonstop8h 30m

Washington, D.C. Dulles Intl

Sat 7/3

21:45-10:00

Nonstop7h 15m

€548

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 19/3

07:05-18:15

2 stops15h 10m

Washington, D.C. Dulles Intl

Wed 1/4

20:20-18:50

2 stops17h 30m

€554

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 2/3

10:00-16:05

1 stop11h 05m

Washington, D.C. Dulles Intl

Sun 8/3

23:20-10:50

Nonstop7h 30m

€556

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Thu 5/3

06:30-17:56

2 stops16h 26m

Baltimore/Washington

Mon 9/3

14:38-07:50

1 stop13h 12m

€561

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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

Other information

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

The cheapest month to fly to Washington, D.C. from London Heathrow Airport is in September. Flight prices, which tend to average around €556, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Washington, D.C. from London Heathrow Airport during January instead. Flights to Washington, D.C. in January, while not as cheap as those in September, still average around €596.

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 €663 when searching weeks before you fly. 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 €595 on momondo.

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

There is only 1 cabin class 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.

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

As of December 2025, prices for London Heathrow Airport to Washington, D.C. flights are approximately 12% more expensive 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 return 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.

Fastest flight time	8h 10m
Direct flights	Every day
Airports in Washington, D.C.	2 airports

The fastest flight from London Heathrow Airport to Washington, D.C. takes 8h 10m

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

There are 2 airports near Washington, D.C.: Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD)

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How far is London Heathrow to Washington, D.C. by plane?
Washington, D.C. is 5873.1 km away from London Heathrow. A reasonable flight in good conditions will take 8h 15m.
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 refreshed on a daily basis.
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 stopovers. 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 travel and health documents required for your trip to Washington, D.C. can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Washington, D.C.. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from London Heathrow Airport to Washington, D.C.?
Based on momondo bookings for flights between London Heathrow Airport and Washington, D.C., the leading plane model is Boeing 777, making up 30.92% of the total bookings. Other popular models include Airbus A330-300 with 10.81%, Boeing 787-9 Dreamliner with 10.38%, and Airbus A350-1000 with 8.29%.

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from London to Washington, D.C.. momondo saves you time and could save you money on your trip.

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

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

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?

If you are not ready to book a flight from London to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

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Find better results for your trip to the United States

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

Washington, D.C. Reagan-National Airport

Washington, D.C. Dulles Intl Airport

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Cheap flights from London Heathrow Airport to Washington, D.C. from €485

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

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

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

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

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

See travel insights to Washington, D.C. from

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

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

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.?

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

There is only 1 cabin class 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.

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

As of December 2025, prices for London Heathrow Airport to Washington, D.C. flights are approximately 12% more expensive when compared to flights at the same time last year.

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

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

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

Historically, on average around 18% 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 132 minutes.

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 departing in the morning have, in the past, seen delays more frequently in comparison.

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

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

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

According to our data, Virgin Atlantic have had the fewest 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?

The number of flights available between London Heathrow Airport and Washington, D.C. is 28 per day as of December 2025. The most frequent departure time is 16:00, with 100% of daily flights leaving in the afternoon.

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

As of December 2025, 199 flights take off from London Heathrow Airport and land in Washington, D.C. each week. The most common flight departure day for this route is Wed, with 16% of weekly flights taking off on this day.

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.

Fastest flight time

Direct flights

Airports in Washington, D.C.

How far is London Heathrow to Washington, D.C. by plane?

When did momondo last update prices 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.?

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

What is the most popular plane model from London Heathrow Airport to Washington, D.C.?

Travelling to a place near Washington, D.C.?

Why use momondo?

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

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

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

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

An easier way to manage your Washington, D.C. trip

We make it super easy to schedule, organise 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 the United States

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

Airports listed have a maximum distance of 36.1 km from Washington, D.C.