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Cheap flights from London to Washington, D.C. from €466

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London to Washington, D.C. departing on 20/2. 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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Cheap return flights

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Icelandair Logo
20:35 - 18:40
LHR
-
BWI
27h 05m
1 stop
Icelandair Logo
19:40 - 10:50
BWI
-
LHR
10h 10m
1 stop
€466Icelandair
Fri, 20 Feb - Mon, 2 Mar
United Airlines Logo
06:55 - 15:00
LHR
-
IAD
13h 05m
1 stop
United Airlines Logo
18:25 - 06:55
IAD
-
LHR
7h 30mdirect
€477United Airlines
Mon, 13 Apr - Tue, 5 May
Lufthansa Logo
07:30 - 15:05
LHR
-
IAD
12h 35m
1 stop
Lufthansa Logo
18:25 - 06:55
IAD
-
LHR
7h 30mdirect
€478Lufthansa
Sun, 12 Apr - Sun, 19 Apr
British Airways Logo
08:50 - 15:35
LHR
-
IAD
11h 45m
1 stop
British Airways Logo
18:20 - 06:30
IAD
-
LHR
7h 10mdirect
€479British Airways
Fri, 6 Feb - Thu, 19 Feb
British Airways Logo
08:50 - 15:35
LHR
-
IAD
11h 45m
1 stop
British Airways Logo
18:20 - 06:30
IAD
-
LHR
7h 10mdirect
€481British Airways
Thu, 29 Jan - Sun, 15 Feb
United Airlines Logo
08:45 - 16:45
LHR
-
IAD
13h 00m
1 stop
United Airlines Logo
06:00 - 20:40
IAD
-
LHR
9h 40m
1 stop
€482United Airlines
Tue, 7 Apr - Sun, 19 Apr
Icelandair Logo
20:35 - 19:40
LHR
-
BWI
27h 05m
1 stop
Icelandair Logo
20:30 - 11:55
BWI
-
LHR
10h 25m
1 stop
€482Icelandair
Tue, 24 Mar - Tue, 7 Apr
Icelandair Logo
12:15 - 19:40
LHR
-
BWI
11h 25m
1 stop
Icelandair Logo
20:30 - 11:55
BWI
-
LHR
10h 25m
1 stop
€484Icelandair
Tue, 17 Mar - Sat, 18 Apr
Lufthansa Logo
12:05 - 15:35
LHR
-
IAD
8h 30mdirect
Lufthansa Logo
18:20 - 06:40
IAD
-
LHR
7h 20mdirect
€491Lufthansa
Tue, 10 Feb - Wed, 25 Feb
Austrian Airlines Logo
12:05 - 15:35
LHR
-
IAD
8h 30mdirect
Austrian Airlines Logo
19:20 - 06:40
IAD
-
LHR
7h 20mdirect
€492Austrian Airlines
Sun, 1 Mar - Sun, 8 Mar

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

Our best United Airlines deals on London to Washington, D.C. flight tickets
United Airlines
13 Apr
LHR09:00London Heathrow
15h 25m
1 stop
IAD19:25Washington, D.C. Dulles Intl
3 May
IAD21:50Washington, D.C. Dulles Intl
7h 50m
LHR10:40London Heathrow
€477
United Airlines
12 Apr
LHR07:30London Heathrow
12h 35m
1 stop
IAD15:05Washington, D.C. Dulles Intl
5 May
IAD21:50Washington, D.C. Dulles Intl
7h 50m
LHR10:40London Heathrow
€478
United Airlines
7 Apr
LHR08:45London Heathrow
13h 00m
1 stop
IAD16:45Washington, D.C. Dulles Intl
19 Apr
IAD06:00Washington, D.C. Dulles Intl
9h 40m
1 stop
LHR20:40London Heathrow
€482

British Airways flights from London to Washington, D.C.

Our best British Airways deals on London to Washington, D.C. flight tickets
British Airways
6 Feb
LHR08:50London Heathrow
11h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
19 Feb
IAD18:20Washington, D.C. Dulles Intl
7h 10m
LHR06:30London Heathrow
€479
British Airways
29 Jan
LHR08:50London Heathrow
11h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
15 Feb
IAD18:20Washington, D.C. Dulles Intl
7h 10m
LHR06:30London Heathrow
€481
British Airways
13 Feb
LHR07:50London Heathrow
12h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
23 Feb
IAD18:20Washington, D.C. Dulles Intl
7h 10m
LHR06:30London Heathrow
€490

momondo Fare Finder

 
Customise your flight search to find flights from London to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 13,528 searches. Data last updated 17 January 2026.
Use the filters below to find and compare flights from London to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Fri 20/2

20:35-18:40

1 stop27h 05m

Baltimore/Washington

Mon 2/3

19:40-10:50

1 stop10h 10m

€466

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 13/4

06:55-15:00

1 stop13h 05m

Washington, D.C. Dulles Intl

Tue 5/5

18:25-06:55

Nonstop7h 30m

€477

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 12/4

07:30-15:05

1 stop12h 35m

Washington, D.C. Dulles Intl

Sun 19/4

18:25-06:55

Nonstop7h 30m

€478

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 6/2

08:50-15:35

1 stop11h 45m

Washington, D.C. Dulles Intl

Thu 19/2

18:20-06:30

Nonstop7h 10m

€479

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 29/1

08:50-15:35

1 stop11h 45m

Washington, D.C. Dulles Intl

Sun 15/2

18:20-06:30

Nonstop7h 10m

€481

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 7/4

08:45-16:45

1 stop13h 00m

Washington, D.C. Dulles Intl

Sun 19/4

06:00-20:40

1 stop9h 40m

€482

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Tue 24/3

20:35-19:40

1 stop27h 05m

Baltimore/Washington

Tue 7/4

20:30-11:55

1 stop10h 25m

€482

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Tue 17/3

12:15-19:40

1 stop11h 25m

Baltimore/Washington

Sat 18/4

20:30-11:55

1 stop10h 25m

€484

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 10/2

12:05-15:35

Nonstop8h 30m

Washington, D.C. Dulles Intl

Wed 25/2

18:20-06:40

Nonstop7h 20m

€491

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 1/3

12:05-15:35

Nonstop8h 30m

Washington, D.C. Dulles Intl

Sun 8/3

19:20-06:40

Nonstop7h 20m

€492

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

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

What is the typical price of a round-trip flight between London and Washington, D.C.?

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 €532, 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 January instead. Flights to Washington, D.C. in January, while not as cheap as those in February, still average around €548.

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

Fly from London Heathrow to Washington, D.C. Dulles Intl for the best London - 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around €648 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 €612 on momondo.

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

There is only 1 cabin class available to choose from on London 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 to Washington, D.C. flights?

No. A direct flight is the cheapest option for a flight between London to Washington, D.C..

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

As of January 2026, prices for London to Washington, D.C. flights are approximately 1% 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 10m

Direct flights

Every day

Airports in Washington, D.C.

2 airports
The fastest flight from London to Washington, D.C. takes 8h 10m
Direct flights go from London to Washington, D.C. every day.
There are 2 airports in Washington, D.C.. From London there are direct flights to Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD).
Search flight deals

  • 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.?

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Gettysburg

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.

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.
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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.

Airports listed have a maximum distance of 36.1 km from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport