Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from London Heathrow Airport to Washington, D.C. from €458

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 Heathrow Airport to Washington, D.C. departing on 10/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
Voted the Winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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

Cheap return flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
06:40 - 15:20LHR-IAD
13h 40m1 stop
Scandinavian Airlines Logo
20:30 - 18:50IAD-LHR
17h 20m2 stops
€517Scandinavian Airlines
Find Deal
Mon, 26 Jan - Mon, 9 Feb
Scandinavian Airlines Logo
21:05 - 17:15LHR-IAD
25h 10m2 stops
Scandinavian Airlines Logo
20:30 - 16:25IAD-LHR
14h 55m2 stops
€523Scandinavian Airlines
Find Deal
Sun, 8 Feb - Thu, 19 Feb
Icelandair Logo
13:05 - 19:25LHR-BWI
11h 20m1 stop
Icelandair Logo
20:30 - 11:55BWI-LHR
10h 25m1 stop
€534Icelandair
Find Deal
Wed, 29 Apr - Sun, 3 May
Icelandair Logo
13:05 - 19:25LHR-BWI
11h 20m1 stop
Icelandair Logo
20:30 - 11:55BWI-LHR
10h 25m1 stop
€535Icelandair
Find Deal
Wed, 29 Apr - Sun, 3 May
United Airlines Logo
18:00 - 20:26LHR-IAD
31h 26m1 stop
United Airlines Logo
18:20 - 06:40IAD-LHR
7h 20mdirect
€538United Airlines
Find Deal
Sat, 13 Dec - Mon, 15 Dec
United Airlines Logo
18:00 - 20:26LHR-IAD
31h 26m1 stop
United Airlines Logo
18:20 - 06:40IAD-LHR
7h 20mdirect
€539United Airlines
Find Deal
Sat, 13 Dec - Mon, 15 Dec
Multiple Airlines Logo
07:30 - 17:30LHR-IAD
14h 00m1 stop
Multiple Airlines Logo
17:40 - 06:20IAD-LHR
7h 40mdirect
€549Multiple Airlines
Find Deal
Thu, 19 Mar - Wed, 1 Apr
Delta Logo
06:30 - 17:23LHR-BWI
15h 53m2 stops
Delta Logo
16:55 - 07:50BWI-LHR
9h 55m1 stop
€550Delta
Find Deal
Thu, 18 Dec - Mon, 5 Jan
Delta Logo
06:30 - 19:12LHR-BWI
17h 42m2 stops
Delta Logo
11:29 - 08:45BWI-LHR
16h 16m2 stops
€555Delta
Find Deal
Mon, 12 Jan - Sun, 18 Jan
Multiple Airlines Logo
10:00 - 16:05LHR-IAD
11h 05m1 stop
Multiple Airlines Logo
23:20 - 10:50IAD-LHR
7h 30mdirect
€555Multiple Airlines
Find Deal
Wed, 4 Mar - Wed, 11 Mar

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
26 Jan
LHR06:40London Heathrow
13h 40m
1 stop
IAD15:20Washington, D.C. Dulles Intl
9 Feb
IAD20:30Washington, D.C. Dulles Intl
17h 20m
2 stops
LHR18:50London Heathrow
€517
Find similar
Scandinavian Airlines
8 Feb
LHR21:05London Heathrow
25h 10m
2 stops
IAD17:15Washington, D.C. Dulles Intl
19 Feb
IAD20:30Washington, D.C. Dulles Intl
14h 55m
2 stops
LHR16:25London Heathrow
€523
Find similar
Scandinavian Airlines
20 Feb
LHR19:50London Heathrow
28h 00m
2 stops
IAD18:50Washington, D.C. Dulles Intl
5 Mar
IAD20:30Washington, D.C. Dulles Intl
17h 20m
2 stops
LHR18:50London Heathrow
€537
Find similar

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
13 Dec
LHR18:00London Heathrow
31h 26m
1 stop
IAD20:26Washington, D.C. Dulles Intl
15 Dec
IAD18:20Washington, D.C. Dulles Intl
7h 20m
LHR06:40London Heathrow
€538
Find similar
United Airlines
13 Dec
LHR18:00London Heathrow
31h 26m
1 stop
IAD20:26Washington, D.C. Dulles Intl
15 Dec
IAD18:20Washington, D.C. Dulles Intl
7h 20m
LHR06:40London Heathrow
€539
Find similar
United Airlines
13 Dec
LHR18:00London Heathrow
31h 26m
1 stop
IAD20:26Washington, D.C. Dulles Intl
15 Dec
IAD17:19Washington, D.C. Dulles Intl
12h 46m
1 stop
LHR11:05London Heathrow
€566
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport 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 10 November 2025.
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

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 26/1

06:40-15:20

1 stop13h 40m

Washington, D.C. Dulles Intl

Mon 9/2

20:30-18:50

2 stops17h 20m

€517

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 8/2

21:05-17:15

2 stops25h 10m

Washington, D.C. Dulles Intl

Thu 19/2

20:30-16:25

2 stops14h 55m

€523

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Wed 29/4

13:05-19:25

1 stop11h 20m

Baltimore/Washington

Sun 3/5

20:30-11:55

1 stop10h 25m

€534

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Wed 29/4

13:05-19:25

1 stop11h 20m

Baltimore/Washington

Sun 3/5

20:30-11:55

1 stop10h 25m

€535

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 13/12

18:00-20:26

1 stop31h 26m

Washington, D.C. Dulles Intl

Mon 15/12

18:20-06:40

Nonstop7h 20m

€538

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 13/12

18:00-20:26

1 stop31h 26m

Washington, D.C. Dulles Intl

Mon 15/12

18:20-06:40

Nonstop7h 20m

€539

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 19/3

07:30-17:30

1 stop14h 00m

Washington, D.C. Dulles Intl

Wed 1/4

17:40-06:20

Nonstop7h 40m

€549

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Thu 18/12

06:30-17:23

2 stops15h 53m

Baltimore/Washington

Mon 5/1

16:55-07:50

1 stop9h 55m

€550

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Mon 12/1

06:30-19:12

2 stops17h 42m

Baltimore/Washington

Sun 18/1

11:29-08:45

2 stops16h 16m

€555

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 4/3

10:00-16:05

1 stop11h 05m

Washington, D.C. Dulles Intl

Wed 11/3

23:20-10:50

Nonstop7h 30m

€555

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 typical price of a round-trip flight between London Heathrow Airport 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 Heathrow Airport is in September. Flight prices, which tend to average around €560, 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 November instead. Flights to Washington, D.C. in November, while not as cheap as those in September, still average around €599.

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 €667 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 €599 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 November 2025, prices for London Heathrow Airport to Washington, D.C. flights are approximately 43% 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 15m

Direct flights

Every day

Airports in Washington, D.C.

2 airports
The fastest flight from London Heathrow Airport to Washington, D.C. takes 8h 15m
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)
Search flight deals

  • 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.?

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.?

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.

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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 10/12
Wed 17/12
By creating a price alert you accept our terms of use and privacy policy.

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