Washington, D.C.

$387+ Cheap flights from Heathrow (LHR) to Washington, D.C. (WAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — WAS
Jun 17 — Jun 241
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Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. are usually found in February or January, booked 44 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

Cheap flight deals from Heathrow to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 12, 2025.

Round-trip from

$657
(ChecknFly)

One-way from

$387
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$870

Good round-trip deal

$747 or less

Good one-way deal

$654 or less
From London Heathrow to Washington, D.C. (WAS)
One-way flight from London Heathrow to Washington, D.C. (WAS)
Highest demand for flights based on searches. 11% potential increase in price ($102 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Average for round-trip flights in June 2025
Price to beat on a round-trip flight from London Heathrow to Washington, D.C. (WAS).
Price to beat on a one-way flight from London Heathrow to Washington, D.C. (WAS).

Find flight deals from Heathrow to Washington, D.C.

Cheapest flights from Heathrow to Washington, D.C.
Explore the most affordable flight options available from Heathrow to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This ChecknFly deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure ChecknFly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/49:55 amLHR - IAD
1 stop14h 36mFinnair
Fri 11/78:50 amIAD - LHR
2 stops18h 45mFinnair
Deal found 6/10$657
This American Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2211:00 amLHR - DCA
1 stop12h 38mAmerican Airlines
Wed 10/83:21 pmDCA - LHR
1 stop11h 29mAmerican Airlines
Deal found 6/10$659
This Scandinavian Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/86:40 amLHR - IAD
2 stops18h 19mScandinavian Airlines
Sun 10/1210:05 pmIAD - LHR
2 stops13h 55mScandinavian Airlines
Deal found 6/10$660
This TravelUp deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/176:30 amLHR - IAD
1 stop14h 05mKLM
Tue 6/2412:49 pmIAD - LHR
1 stop12h 56mKLM
Deal found 6/10$661
This Netflights deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/178:40 amLHR - IAD
1 stop11h 55mVirgin Atlantic
Tue 6/243:31 pmIAD - LHR
2 stops14h 54mVirgin Atlantic
Deal found 6/10$662
This Air Canada deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/316:30 amLHR - DCA
2 stops15h 37mMultiple Airlines
Mon 11/312:55 pmDCA - LHR
2 stops13h 15mMultiple Airlines
Deal found 6/12$663
This Trip.com deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/106:15 pmLHR - DCA
1 stop18h 49mVirgin Atlantic
Wed 10/111:00 amDCA - LHR
1 stop14h 25mVirgin Atlantic
Deal found 6/11$664
This Justfly.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/197:50 pmLHR - IAD
1 stop24h 30mTAP AIR PORTUGAL
Wed 10/2911:30 pmIAD - LHR
1 stop18h 05mTAP AIR PORTUGAL
Deal found 6/12$665
This United Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/198:30 amLHR - IAD
1 stop30h 07mUnited Airlines
Sun 7/205:31 pmIAD - LHR
1 stop11h 39mUnited Airlines
Deal found 6/11$668
This Trip.com deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/178:55 amLHR - DCA
1 stop15h 07mIberia
Mon 9/223:35 pmDCA - LHR
1 stop13h 05mIberia
Deal found 6/10$669
This Delta deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1212:35 pmLHR - IAD
Nonstop8h 25mDelta
Thu 9/115:50 pmIAD - LHR
Nonstop7h 30mDelta
Deal found 6/12$671
This TravelTrolley deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelTrolley is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/132:05 pmLHR - DCA
1 stop12h 46mAir Canada
Sat 9/276:00 amDCA - LHR
1 stop22h 35mAir Canada
Deal found 6/12$671

Cheapflights Fare Finder

Customize your flight search to find flights from Heathrow 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, Cheapflights users made 2,558,603 searches. Data last updated June 12, 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

Heathrow

Fly to

Washington, D.C.

Route

Depart

Return

Price

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 11/4

9:55 am-7:31 pm

1 stop14h 36m

Washington, D.C. Dulles Intl

Fri 11/7

8:50 am-8:35 am

2 stops18h 45m

$657

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Fri 8/22

11:00 am-6:38 pm

1 stop12h 38m

Washington, D.C. Reagan-National

Wed 10/8

3:21 pm-7:50 am

1 stop11h 29m

$659

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Wed 10/8

6:40 am-7:59 pm

2 stops18h 19m

Washington, D.C. Dulles Intl

Sun 10/12

10:05 pm-5:00 pm

2 stops13h 55m

$660

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 10/18

12:15 pm-3:30 pm

Nonstop8h 15m

Washington, D.C. Dulles Intl

Sat 10/18

5:37 pm-6:30 am

1 stop31h 53m

$661

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sat 9/6

8:40 am-3:35 pm

1 stop11h 55m

Washington, D.C. Dulles Intl

Fri 9/12

5:50 pm-6:20 am

Nonstop7h 30m

$662

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Fri 10/31

6:30 am-6:07 pm

2 stops15h 37m

Washington, D.C. Reagan-National

Mon 11/3

12:55 pm-7:10 am

2 stops13h 15m

$663

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 9/10

6:15 pm-8:04 am

1 stop18h 49m

Washington, D.C. Reagan-National

Wed 10/1

11:00 am-6:25 am

1 stop14h 25m

$664

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Sun 10/19

7:50 pm-3:20 pm

1 stop24h 30m

Washington, D.C. Dulles Intl

Wed 10/29

11:30 pm-9:35 pm

1 stop18h 05m

$665

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 9/17

8:55 am-7:02 pm

1 stop15h 07m

Washington, D.C. Reagan-National

Mon 9/22

3:35 pm-9:40 am

1 stop13h 05m

$669

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Tue 8/12

12:35 pm-4:00 pm

Nonstop8h 25m

Washington, D.C. Dulles Intl

Thu 9/11

5:50 pm-6:20 am

Nonstop7h 30m

$671

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 56 results
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The best insider tips for London Heathrow Airport to Washington, D.C. flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your London Heathrow Airport to Washington, D.C. trip
Airlines
British Airways

BA's Club Suite offers private pods with a door, enhancing comfort on long-haul flights.


BA's World Traveller Plus offers extra seat width and legroom, ideal for long-haul comfort.

United Airlines

United's Polaris Business Class features lie-flat seats, Saks Fifth Avenue bedding, and upscale amenities.


United's Premium Plus offers extra legroom, upgraded meals, and two checked bags on international flights.

Airports
LHR

For a smooth departure from Heathrow, arrive early to enjoy lounges like the Cathay Pacific lounge in Terminal 3, known for its dan dan noodles.

Read more about LHRby Ramsey Qubein
IAD

Upon arriving at IAD, take the Silver Line Metro for a cost-effective and quick 40-minute ride to Washington, D.C.

Read more about IADby Ramsey Qubein
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR and IAD

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Best time to book a flight from Heathrow to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Heathrow with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Washington, D.C.

How far ahead should I book a flight from London Heathrow Airport to Washington, D.C.?

Use this chart to determine the optimal time to book a round-trip flight from Heathrow to Washington, D.C.. Price data was last updated on June 9, 2025.

Booking 44 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from London Heathrow Airport to Washington, D.C.?

Currently, August is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. (average of $241). Flying from London Heathrow Airport to Washington, D.C. in March is currently the most expensive (average of $290). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to WAS?

Find hourly flight availability from Heathrow to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

When flying from London Heathrow Airport to Washington, D.C., the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 17% versus a flight in the afternoon.

What is the cheapest day to fly from London Heathrow Airport to Washington, D.C.?

Use this chart to determine the cheapest time to fly round-trip from Heathrow to Washington, D.C.. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their London Heathrow Airport to Washington, D.C. flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from London Heathrow Airport to Washington, D.C.

Explore weekly flight availability from Heathrow to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 12, 2025.

The most flights from LHR to WAS are scheduled on a Wednesday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. when rainfall is around 2.6 in.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated June 12, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Austrian Airlines from London to Washington, D.C. to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good
8.0
Very good

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
8.0
Very good

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

Food

7.3

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What are the cheapest airlines flying from London Heathrow Airport to Washington, D.C. round-trip?

    Currently priced at $657, Finnair will fly you from London Heathrow Airport to Washington, D.C. and back. In addition to Finnair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Scandinavian Airlines - these airlines can fly you to your destination from $659 and $660, respectively. Finnair is 18% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from London Heathrow Airport to Washington, D.C. one-way?

    For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as $506. Users have also found prices from $541 and $550 on Scandinavian Airlines and Aer Lingus, respectively.

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

  • What are the most reliable airlines from London Heathrow Airport to Washington, D.C.?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London Heathrow Airport to Washington, D.C. on time: American Airlines (57%), Aer Lingus (57%), Finnair (57%).

  • What are the cheapest flights from London Heathrow Airport to Washington, D.C.?

    Looking at all options, your cheapest flight can be booked for $598. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $441 on average our data indicates $2,233 when flying from London Heathrow Airport to Washington, D.C..

  • Can I find deals for flights from Heathrow to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Heathrow to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Washington, D.C.?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Washington, D.C..

  • Can I find deals for business class flights from Heathrow to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Heathrow to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to Washington, D.C.?

    Currently, August is the cheapest month in which you can book a flight from London Heathrow Airport to Washington, D.C. (average of $241). Flying from London Heathrow Airport to Washington, D.C. in March is currently the most expensive (average of $290). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Arlington
Alexandria
Woodbridge
Tysons
Silver Spring
Linthicum Heights
Fredericksburg
Gaithersburg
Fairfax
Falls Church
Easton
Herndon
Towson
Bowie
Rockville
Reston
National Harbor
Springfield
Manassas
Dundalk

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from Heathrow to Washington, D.C.

Discover the top 10 airlines that operate flights from Heathrow to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$390Average$833FlexibilityNo cancel feeOn-time77%
PLAYCheapest$392Average$560FlexibilityNo cancel feeOn-timeN/A
Austrian AirlinesCheapest$431Average$986FlexibilityNo cancel feeOn-time78%
IcelandairCheapest$529Average$993FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$564Average$804FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$595Average$871FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$619Average$787FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$652Average$812FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$652Average$984FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$682Average$886FlexibilityNo cancel feeOn-time69%

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