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Cheap flights from London Heathrow Airport to Washington, D.C. from €382

This is the cheapest return 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 3/5. 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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Find the cheapest flights from London Heathrow Airport to Washington, D.C.

Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from London Heathrow Airport to Washington, D.C..
14:05 - 07:26LHR-IAD
22h 21m2 stops
13:53 - 10:00IAD-LHR
15h 07m1 stop
€382United Airlines
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Sat, 3 May - Sun, 4 May
14:05 - 07:27LHR-IAD
22h 22m2 stops
17:44 - 10:00IAD-LHR
11h 16m1 stop
€383United Airlines
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Sat, 26 Apr - Sun, 27 Apr
06:40 - 19:59LHR-IAD
18h 19m1 stop
22:05 - 16:00IAD-LHR
12h 55m1 stop
€543Scandinavian Airlines
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Mon, 25 Aug - Thu, 11 Sep
07:05 - 19:59LHR-IAD
17h 54m2 stops
22:05 - 18:30IAD-LHR
15h 25m1 stop
€546Scandinavian Airlines
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Wed, 7 May - Mon, 19 May
13:05 - 19:25LHR-BWI
11h 20m1 stop
20:30 - 20:20BWI-LHR
18h 50m1 stop
€554Icelandair
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Thu, 1 May - Wed, 7 May
21:25 - 19:25LHR-BWI
27h 00m1 stop
20:30 - 20:20BWI-LHR
18h 50m1 stop
€555Icelandair
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Sat, 3 May - Wed, 7 May
06:00 - 16:15LHR-IAD
15h 15m1 stop
20:45 - 17:50IAD-LHR
16h 05m1 stop
€638SWISS
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Sat, 26 Apr - Tue, 29 Apr
08:30 - 15:00LHR-IAD
11h 30m1 stop
22:15 - 10:40IAD-LHR
7h 25mdirect
€642Lufthansa
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Thu, 24 Apr - Wed, 30 Apr
08:30 - 15:00LHR-IAD
11h 30m1 stop
18:30 - 06:55IAD-LHR
7h 25mdirect
€644Lufthansa
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Thu, 24 Apr - Wed, 30 Apr
18:40 - 16:15LHR-IAD
26h 35m1 stop
20:45 - 21:45IAD-LHR
20h 00m1 stop
€781SWISS
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Mon, 30 Jun - Sun, 6 Jul

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

Our best British Airways deals on London Heathrow Airport to Washington, D.C. flight tickets
British Airways
9 Apr
LHR16:35London Heathrow
8h 00m
BWI19:35Baltimore/Washington
14 Apr
BWI21:20Baltimore/Washington
7h 15m
LHR09:35London Heathrow
British Airways
14 Apr
LHR16:35London Heathrow
8h 00m
BWI19:35Baltimore/Washington
28 Apr
BWI17:55Baltimore/Washington
10h 10m
1 stop
LHR09:05London Heathrow
British Airways
15 Apr
LHR17:00London Heathrow
8h 10m
IAD20:10Washington, D.C. Dulles Intl
15 May
IAD22:40Washington, D.C. Dulles Intl
7h 25m
LHR11:05London Heathrow

Finnair flights from London Heathrow Airport to Washington, D.C.

Our best Finnair deals on London Heathrow Airport to Washington, D.C. flight tickets
Finnair
8 May
LHR17:00London Heathrow
8h 05m
IAD20:05Washington, D.C. Dulles Intl
16 May
IAD22:40Washington, D.C. Dulles Intl
7h 25m
LHR11:05London Heathrow
Finnair
29 Apr
LHR16:35London Heathrow
8h 00m
BWI19:35Baltimore/Washington
2 Jun
BWI21:20Baltimore/Washington
7h 15m
LHR09:35London Heathrow
Finnair
9 Jun
LHR16:35London Heathrow
8h 00m
BWI19:35Baltimore/Washington
21 Jun
BWI21:20Baltimore/Washington
7h 15m
LHR09:35London Heathrow

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 February. Flight prices, which tend to average around €645, 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 Heathrow Airport during January instead. Flights to Washington, D.C. in January, while not as cheap as those in February, still average around €661.

What is the cheapest day to depart on your flight to Washington, D.C.?

The cheapest day to depart from London Heathrow Airport to Washington, D.C. is on a Monday. Travellers who choose to depart for Washington, D.C. on a Monday will often find tickets for as low as €0. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Washington, D.C. on Sunday is €945.

What is the cheapest time of day to depart on your flight to Washington, D.C.?

Flying to Washington, D.C. from London Heathrow Airport at midday is the least expensive time of day to depart. momondo users have found prices as low as €0 when looking at flights departing at midday. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are €945 on average. Flights to Washington, D.C. from London Heathrow Airport in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 25 weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around €808 when searching 25 weeks out.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 €683 on momondo.

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

As of March 2025, prices for London Heathrow Airport to Washington, D.C. flights are approximately 3% 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.

Best price found

€419

Fastest flight time

8h 00m

Direct flights

Every day

Airports in Washington, D.C.

2 airports
The best one-way flight to Washington, D.C. from London Heathrow Airport in the past 72 hours is €419. The best return flight deal from London Heathrow Airport to Washington, D.C. found on momondo in the last 72 hours is €382.
The fastest flight from London Heathrow Airport to Washington, D.C. takes 8h 00m
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)

  • 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 00m.

  • 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.


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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.