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

As of August 2025, 27 flights take off from London and land in Washington, D.C. each day. The most common flight departure time for this route is 12:00, with 100% of daily flights taking off in the afternoon.

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

As of August 2025, there are 189 flights per week flying from London to Washington, D.C.. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.

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

WestJet, TAP AIR PORTUGAL, and Icelandair are the most popular carriers operating from London to Washington, D.C.

When did momondo last update prices for flights from London to Washington, D.C.?

Prices for flights from London to Washington, D.C. refresh daily.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Washington, D.C..

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

The required travel and health documents for your Washington, D.C. 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 licence and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

€459 Cheap Flights from London to Washington, D.C. (LON-WAS) in 2025

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Find the cheapest flights from London to Washington, D.C. (LON-WAS)

Round-trip

One-way

Last minute

Direct

Cheap return flights

06:40 - 19:59LHR-IAD

18h 19m1 stop

22:05 - 21:20IAD-LHR

18h 15m2 stops

€492Scandinavian Airlines

Find Deal

Tue, 7 Oct - Wed, 15 Oct

06:40 - 19:59LHR-IAD

18h 19m1 stop

22:05 - 16:00IAD-LHR

12h 55m1 stop

€494Scandinavian Airlines

Find Deal

Mon, 20 Oct - Fri, 24 Oct

12:10 - 19:30LHR-IAD

12h 20m1 stop

21:00 - 13:25IAD-LHR

11h 25m1 stop

€497Aer Lingus

Find Deal

Fri, 5 Dec - Fri, 19 Dec

06:40 - 19:59LHR-IAD

18h 19m2 stops

22:05 - 17:00IAD-LHR

13h 55m2 stops

€498Scandinavian Airlines

Find Deal

Tue, 7 Oct - Wed, 15 Oct

10:20 - 17:15LHR-IAD

11h 55m1 stop

20:30 - 16:25IAD-LHR

14h 55m2 stops

€499Scandinavian Airlines

Find Deal

Mon, 3 Nov - Mon, 10 Nov

21:25 - 19:20LHR-IAD

26h 55m1 stop

20:30 - 11:55IAD-LHR

10h 25m1 stop

€504Icelandair

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Sun, 14 Sep - Sun, 28 Sep

09:00 - 16:40LHR-IAD

12h 40m1 stop

08:29 - 07:10IAD-LHR

17h 41m2 stops

€506United Airlines

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Tue, 3 Feb - Sun, 8 Feb

09:30 - 11:13LHR-IAD

30h 43m1 stop

06:15 - 20:40IAD-LHR

9h 25m1 stop

€507United Airlines

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Sat, 11 Oct - Mon, 13 Oct

21:25 - 19:20LHR-IAD

26h 55m1 stop

23:15 - 11:55IAD-LHR

31h 40m1 stop

€509Icelandair

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Sun, 14 Sep - Sat, 27 Sep

06:00 - 14:35LHR-IAD

13h 35m1 stop

17:15 - 11:45IAD-LHR

13h 30m1 stop

€518Austrian Airlines

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Fri, 26 Sep - Tue, 21 Oct

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

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

United Airlines

3 Feb

LHR09:00London Heathrow

12h 40m

1 stop

IAD16:40Washington, D.C. Dulles Intl

8 Feb

IAD08:29Washington, D.C. Dulles Intl

17h 41m

2 stops

LHR07:10London Heathrow

€506

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United Airlines

11 Oct

LHR09:30London Heathrow

30h 43m

1 stop

IAD11:13Washington, D.C. Dulles Intl

13 Oct

IAD06:15Washington, D.C. Dulles Intl

9h 25m

1 stop

LHR20:40London Heathrow

€507

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United Airlines

10 Jan

LHR13:30London Heathrow

11h 45m

1 stop

IAD20:15Washington, D.C. Dulles Intl

24 Jan

IAD22:15Washington, D.C. Dulles Intl

7h 35m

LHR10:50London Heathrow

€511

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Lufthansa flights from London to Washington, D.C.

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

Lufthansa

8 Oct

LHR16:40London Heathrow

8h 15m

IAD19:55Washington, D.C. Dulles Intl

20 Oct

IAD22:25Washington, D.C. Dulles Intl

7h 15m

LHR10:40London Heathrow

€544

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Lufthansa

5 Sept

LHR16:40London Heathrow

8h 15m

IAD19:55Washington, D.C. Dulles Intl

7 Sept

IAD22:25Washington, D.C. Dulles Intl

7h 15m

LHR10:40London Heathrow

€618

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Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 7/10

06:40-19:59

1 stop18h 19m

Washington, D.C. Dulles Intl

Wed 15/10

22:05-21:20

2 stops18h 15m

€492

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 20/10

06:40-19:59

1 stop18h 19m

Washington, D.C. Dulles Intl

Fri 24/10

22:05-16:00

1 stop12h 55m

€494

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 5/12

12:10-19:30

1 stop12h 20m

Washington, D.C. Dulles Intl

Fri 19/12

21:00-13:25

1 stop11h 25m

€496

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 7/10

06:40-19:59

2 stops18h 19m

Washington, D.C. Dulles Intl

Wed 15/10

22:05-17:00

2 stops13h 55m

€498

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 3/11

10:20-17:15

1 stop11h 55m

Washington, D.C. Dulles Intl

Mon 10/11

20:30-16:25

2 stops14h 55m

€499

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 14/9

21:25-19:20

1 stop26h 55m

Washington, D.C. Dulles Intl

Sun 28/9

20:30-11:55

1 stop10h 25m

€504

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 3/2

09:00-16:40

1 stop12h 40m

Washington, D.C. Dulles Intl

Sun 8/2

08:29-07:10

2 stops17h 41m

€506

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 11/10

09:30-11:13

1 stop30h 43m

Washington, D.C. Dulles Intl

Mon 13/10

06:15-20:40

1 stop9h 25m

€507

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 14/9

21:25-19:20

1 stop26h 55m

Washington, D.C. Dulles Intl

Sat 27/9

23:15-11:55

1 stop31h 40m

€509

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 26/9

06:00-14:35

1 stop13h 35m

Washington, D.C. Dulles Intl

Tue 21/10

17:15-11:45

1 stop13h 30m

€518

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London 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

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Other information

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

The cheapest month to fly to Washington, D.C. from London is in February. Flight prices, which tend to average around €534, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Washington, D.C. from London during November instead. Flights to Washington, D.C. in November, while not as cheap as those in February, still average around €567.

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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around €683 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 for as low as €628 on momondo.

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

As of August 2025, prices for London to Washington, D.C. flights are approximately 55% more expensive when compared to flights at the same time last year.

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

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

Estimated return price

Cheap London to Washington, D.C. (LON to WAS) flight deals and tips

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

Fastest flight time	8h 05m
Direct flights	Every day
Airports in Washington, D.C.	2 airports

The fastest flight from London to Washington, D.C. takes 8h 05m

Direct flights go from London 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 to Washington, D.C. by plane?
A flight from London to Washington, D.C. will travel around 5893.9 km. By plane, this route typically takes 8h 10m.
When did momondo last update prices for flights from London to Washington, D.C.?
Prices for flights from London to Washington, D.C. refresh daily.
How old do you have to be to fly from London to Washington, D.C.?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Washington, D.C..
What documentation or ID do you need to fly to Washington, D.C.?
The required travel and health documents for your Washington, D.C. 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 licence and a passport valid for six months after your intended arrival at Washington, D.C.. 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 London to Washington, D.C.?
momondo data reveals that the most frequently booked plane model on the route from London to Washington, D.C. is Boeing 777, representing 33.19% of all bookings. The subsequent popular models are Airbus A380-800 at 12.38%, Airbus A330-300 at 10.79%, and Boeing 787-9 Dreamliner at 9.11%.

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Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from London.

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?

If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from London and alert you when they change.