Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from London Heathrow Airport to Washington, D.C. from £252

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 7/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Voted 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.

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..
United Airlines Logo
14:05 - 07:26LHR-IAD
22h 21m2 stops
United Airlines Logo
13:53 - 10:00IAD-LHR
15h 07m1 stop
£320United Airlines
Find Deal
Sat, 3 May - Sun, 4 May
United Airlines Logo
09:30 - 11:14LHR-IAD
30h 44m1 stop
United Airlines Logo
15:35 - 07:15IAD-LHR
10h 40m1 stop
£323United Airlines
Find Deal
Sat, 3 May - Sun, 4 May
Lufthansa Logo
15:50 - 07:10LHR-IAD
20h 20m2 stops
Lufthansa Logo
22:07 - 06:20IAD-LHR
27h 13m1 stop
£389Lufthansa
Find Deal
Sat, 3 May - Sun, 11 May
Lufthansa Logo
18:00 - 07:10LHR-IAD
18h 10m1 stop
Lufthansa Logo
22:07 - 06:20IAD-LHR
27h 13m1 stop
£392Lufthansa
Find Deal
Sat, 3 May - Sun, 11 May
Icelandair Logo
21:25 - 19:25LHR-BWI
27h 00m1 stop
Icelandair Logo
20:30 - 11:55BWI-LHR
10h 25m1 stop
£406Icelandair
Find Deal
Thu, 24 Apr - Wed, 30 Apr
Icelandair Logo
08:15 - 22:59LHR-DCA
19h 44m1 stop
Icelandair Logo
17:15 - 20:45DCA-LHR
22h 30m1 stop
£424Icelandair
Find Deal
Mon, 8 Sep - Sun, 21 Sep
British Airways Logo
17:05 - 20:15LHR-IAD
8h 10mdirect
British Airways Logo
17:40 - 06:15IAD-LHR
7h 35mdirect
£491British Airways
Find Deal
Sun, 13 Apr - Fri, 6 Jun
British Airways Logo
12:45 - 15:50LHR-IAD
8h 05mdirect
British Airways Logo
22:40 - 11:05IAD-LHR
7h 25mdirect
£491British Airways
Find Deal
Mon, 14 Apr - Mon, 2 Jun
Virgin Atlantic Logo
12:35 - 16:00LHR-IAD
8h 25mdirect
Virgin Atlantic Logo
17:50 - 06:20IAD-LHR
7h 30mdirect
£543Virgin Atlantic
Find Deal
Thu, 24 Apr - Sun, 27 Apr
Virgin Atlantic Logo
12:35 - 16:00LHR-IAD
8h 25mdirect
Virgin Atlantic Logo
17:50 - 06:20IAD-LHR
7h 30mdirect
£546Virgin Atlantic
Find Deal
Fri, 25 Apr - Wed, 30 Apr

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

Our best Icelandair deals on London Heathrow Airport to Washington, D.C. flight tickets
Icelandair
24 Apr
LHR21:25London Heathrow
27h 00m
1 stop
BWI19:25Baltimore/Washington
30 Apr
BWI20:30Baltimore/Washington
10h 25m
1 stop
LHR11:55London Heathrow
Icelandair
8 Sept
LHR08:15London Heathrow
19h 44m
1 stop
DCA22:59Washington, D.C. Reagan-National
21 Sept
DCA17:15Washington, D.C. Reagan-National
22h 30m
1 stop
LHR20:45London Heathrow
Icelandair
23 Apr
LHR21:25London Heathrow
27h 00m
1 stop
BWI19:25Baltimore/Washington
30 Apr
BWI20:30Baltimore/Washington
10h 25m
1 stop
LHR11:55London Heathrow

American Airlines flights from London Heathrow Airport to Washington, D.C.

Our best American Airlines deals on London Heathrow Airport to Washington, D.C. flight tickets
American Airlines
15 Apr
LHR14:25London Heathrow
12h 24m
1 stop
BWI21:49Baltimore/Washington
3 Jun
BWI13:45Baltimore/Washington
12h 55m
1 stop
LHR07:40London Heathrow
American Airlines
8 Apr
LHR09:15London Heathrow
12h 04m
1 stop
DCA16:19Washington, D.C. Reagan-National
13 Apr
DCA14:55Washington, D.C. Reagan-National
14h 20m
1 stop
LHR10:15London Heathrow
American Airlines
17 Apr
LHR15:00London Heathrow
12h 19m
1 stop
BWI22:19Baltimore/Washington
3 Jun
BWI13:45Baltimore/Washington
14h 15m
1 stop
LHR09:00London 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 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 £541, are often lower during this time because this is during the off-season. If you don’t want to visit Washington, D.C. in February, then you should wait until January to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £554.

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

On average, the least expensive day to fly to Washington, D.C. from London Heathrow Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £645. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from London Heathrow Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £747.

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

In the evening is the cheapest time of day to fly from London Heathrow Airport to Washington, D.C. when you can find flight prices for as low as £531. Flying to Washington, D.C. in the evening is an ideal time because this is during off-peak travel hours. Flights to Washington, D.C. are more costly in the afternoon, with an average ticket price of £682. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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 25 weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around £678 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 £573 on momondo.

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

There are 4 cabin classes 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 April 2025, prices for London Heathrow Airport to Washington, D.C. flights are approximately 6% 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

£252

Fastest flight time

8h 00m

Direct flights

Every day

Airports in Washington, D.C.

3 airports
The best one-way flight to Washington, D.C. from London Heathrow Airport in the past 72 hours is £252. The best return flight deal from London Heathrow Airport to Washington, D.C. found on momondo in the last 72 hours is £320.
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 3 airports near Washington, D.C.: Washington, D.C. Reagan-National (DCA), Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD)

  • How far is London Heathrow to Washington, D.C. by plane?

    The straight-line distance from London Heathrow to Washington, D.C. is 3649.4 mi. Flights usually cover this in 8h 00m, depending on flying conditions and air traffic around both airports.

  • 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 updated daily.

  • How many operators does momondo search for flights from London Heathrow Airport to Washington, D.C.?

  • 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 layovers. 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 license, 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.?

  • What is the most popular airline from London Heathrow Airport to Washington, D.C.?


Best airlines flying from London Heathrow Airport to Washington, D.C.

Compare and see reviews for airlines that fly from London Heathrow Airport to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
PLAYPriceFrom £287Free CancellationRating
6.9
97 reviews
Search PLAY flights
DeltaPriceFrom £331Free CancellationRating
8.0
7,899 reviews
Search Delta flights
IcelandairPriceFrom £378Free CancellationRating
7.0
476 reviews
Search Icelandair flights
Brussels AirlinesPriceFrom £396Free CancellationRating
7.3
345 reviews
Search Brussels Airlines flights
JetBluePriceFrom £396Free CancellationRating
7.3
2,924 reviews
Search JetBlue flights
TAP AIR PORTUGALPriceFrom £416Free CancellationRating
7.1
1,831 reviews
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesPriceFrom £457Free CancellationRating
7.3
1,328 reviews
Search Scandinavian Airlines flights
Air FrancePriceFrom £457Free CancellationRating
7.4
1,427 reviews
Search Air France flights
FinnairPriceFrom £468Free CancellationRating
7.6
1,267 reviews
Search Finnair flights
KLMPriceFrom £478Free CancellationRating
7.8
1,323 reviews
Search KLM flights
  • Delta Flights From London Heathrow Airport to Washington, D.C.

    Delta flies from London Heathrow Airport to Washington, D.C. around 6 times per week, with 7,897 momondo users rating the airline 8.0/10. The cheapest Delta deal from London Heathrow Airport to Washington, D.C. in the last 72 hours was £428 (round-trip), much lower than the average airfare cost of £1,022 for Delta flights on this route.

  • KLM Flights From London Heathrow Airport to Washington, D.C.

    The best KLM deal for London Heathrow Airport to Washington, D.C. flight tickets found on momondo in the last 72 hours was £617, round-trip. It should be noted that an average KLM flight deal for this route in this time was higher, at £900 round-trip. KLM operates 6 flights out of London Heathrow Airport into Washington, D.C. in an average week, so prices vary by time and availability. 1,323 KLM reviews by users on momondo have scored the airline at 7.8/10.


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

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Laurel
Essex
National Harbor
Fairfax
Manassas
Bethesda
Oxon Hill
College Park
Hyattsville
Linthicum Heights
Gettysburg
Cambridge
Ellicott City
Westminster
Arlington
Hanover
Woodbridge
Owings Mills
Silver Spring

Why use momondo?

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

Finding the right flight to Washington, D.C. from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?

Flights from London to Washington, D.C. with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from London to Washington, D.C.?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Washington, D.C..

I’m not ready to book a flight from London to Washington, D.C. right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of London to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.


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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Mon 7/4
Mon 14/4

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 22.4 mi from Washington, D.C.