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Cheap flights from London to Washington, D.C. from €482

This is the cheapest one-way 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 13/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Cheap return flights

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Scandinavian Airlines Logo
19:50 - 18:50
LHR
-
IAD
28h 00m2 stops
Scandinavian Airlines Logo
20:30 - 17:40
IAD
-
LHR
16h 10m1 stop
€535Scandinavian Airlines
Fri, 20 Feb - Mon, 23 Feb
Scandinavian Airlines Logo
21:05 - 18:50
LHR
-
IAD
26h 45m2 stops
Scandinavian Airlines Logo
20:30 - 17:40
IAD
-
LHR
16h 10m1 stop
€537Scandinavian Airlines
Fri, 6 Feb - Thu, 19 Feb
Icelandair Logo
12:15 - 18:30
LHR
-
IAD
11h 15m1 stop
Icelandair Logo
19:40 - 19:30
IAD
-
LHR
18h 50m1 stop
€539Icelandair
Sat, 24 Jan - Wed, 28 Jan
Icelandair Logo
12:15 - 18:30
LHR
-
IAD
11h 15m1 stop
Icelandair Logo
19:40 - 10:50
IAD
-
LHR
10h 10m1 stop
€541Icelandair
Fri, 23 Jan - Sat, 7 Feb
Icelandair Logo
20:35 - 18:30
LHR
-
IAD
26h 55m1 stop
Icelandair Logo
19:40 - 10:50
IAD
-
LHR
10h 10m1 stop
€542Icelandair
Tue, 20 Jan - Wed, 28 Jan
Scandinavian Airlines Logo
10:35 - 15:20
LHR
-
IAD
33h 45m2 stops
Scandinavian Airlines Logo
20:30 - 16:00
IAD
-
LHR
14h 30m1 stop
€545Scandinavian Airlines
Sun, 18 Jan - Sat, 31 Jan
Scandinavian Airlines Logo
21:05 - 17:15
LHR
-
IAD
49h 10m2 stops
Scandinavian Airlines Logo
20:30 - 16:00
IAD
-
LHR
14h 30m1 stop
€549Scandinavian Airlines
Mon, 19 Jan - Sat, 31 Jan
Delta Logo
11:15 - 23:01
LHR
-
BWI
15h 46m2 stops
Delta Logo
10:53 - 09:15
BWI
-
LHR
17h 22m1 stop
€594Delta
Sat, 28 Mar - Sat, 11 Apr
Delta Logo
06:20 - 19:19
LHR
-
BWI
16h 59m2 stops
Delta Logo
10:53 - 09:15
BWI
-
LHR
17h 22m1 stop
€599Delta
Fri, 27 Mar - Sun, 12 Apr
Virgin Atlantic Logo
13:00 - 23:01
LHR
-
BWI
14h 01m1 stop
Virgin Atlantic Logo
12:04 - 06:45
BWI
-
LHR
13h 41m1 stop
€608Virgin Atlantic
Sat, 28 Mar - Fri, 10 Apr

Icelandair flights from London to Washington, D.C.

Our best Icelandair deals on London to Washington, D.C. flight tickets
Icelandair
24 Jan
LHR12:15London Heathrow
11h 15m
1 stop
IAD18:30Washington, D.C. Dulles Intl
28 Jan
IAD19:40Washington, D.C. Dulles Intl
18h 50m
1 stop
LHR19:30London Heathrow
€539
Find similar
Icelandair
23 Jan
LHR12:15London Heathrow
11h 15m
1 stop
IAD18:30Washington, D.C. Dulles Intl
8 Feb
IAD19:40Washington, D.C. Dulles Intl
10h 10m
1 stop
LHR10:50London Heathrow
€541
Find similar
Icelandair
20 Jan
LHR20:35London Heathrow
26h 55m
1 stop
IAD18:30Washington, D.C. Dulles Intl
9 Feb
IAD19:40Washington, D.C. Dulles Intl
10h 10m
1 stop
LHR10:50London Heathrow
€542
Find similar

Delta flights from London to Washington, D.C.

Our best Delta deals on London to Washington, D.C. flight tickets
Delta
16 Feb
LHR08:40London Heathrow
12h 25m
1 stop
IAD16:05Washington, D.C. Dulles Intl
24 Feb
IAD22:20Washington, D.C. Dulles Intl
7h 30m
LHR10:50London Heathrow
€589
Find similar
Delta
28 Mar
LHR11:15London Heathrow
15h 46m
2 stops
BWI23:01Baltimore/Washington
11 Apr
BWI10:53Baltimore/Washington
17h 22m
1 stop
LHR09:15London Heathrow
€594
Find similar
Delta
27 Mar
LHR06:20London Heathrow
16h 59m
2 stops
BWI19:19Baltimore/Washington
12 Apr
BWI10:53Baltimore/Washington
17h 22m
1 stop
LHR09:15London Heathrow
€599
Find similar

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 15 December 2025.
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

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 20/2

19:50-18:50

2 stops28h 00m

Washington, D.C. Dulles Intl

Mon 23/2

20:30-17:40

1 stop16h 10m

€535

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 6/2

21:05-18:50

2 stops26h 45m

Washington, D.C. Dulles Intl

Thu 19/2

20:30-17:40

1 stop16h 10m

€537

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 24/1

12:15-18:30

1 stop11h 15m

Washington, D.C. Dulles Intl

Wed 28/1

19:40-19:30

1 stop18h 50m

€539

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 23/1

12:15-18:30

1 stop11h 15m

Washington, D.C. Dulles Intl

Sat 7/2

19:40-10:50

1 stop10h 10m

€541

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 20/1

20:35-18:30

1 stop26h 55m

Washington, D.C. Dulles Intl

Wed 28/1

19:40-10:50

1 stop10h 10m

€542

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 18/1

10:35-15:20

2 stops33h 45m

Washington, D.C. Dulles Intl

Sat 31/1

20:30-16:00

1 stop14h 30m

€545

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 19/1

21:05-17:15

2 stops49h 10m

Washington, D.C. Dulles Intl

Sat 31/1

20:30-16:00

1 stop14h 30m

€548

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Sat 28/3

11:15-23:01

2 stops15h 46m

Baltimore/Washington

Sat 11/4

10:53-09:15

1 stop17h 22m

€594

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Fri 27/3

06:20-19:19

2 stops16h 59m

Baltimore/Washington

Sun 12/4

10:53-09:15

1 stop17h 22m

€599

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Sat 28/3

13:00-23:01

1 stop14h 01m

Baltimore/Washington

Fri 10/4

12:04-06:45

1 stop13h 41m

€608

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 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 €531, 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 September instead. Flights to Washington, D.C. in September, 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 €650 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 €580 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 December 2025, prices for London to Washington, D.C. flights are approximately 53% 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