Washington, D.C.

$354+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — WAS
Jul 8 — Jul 151
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Cheapflights Tip: The best prices from London Heathrow to Washington, D.C. are usually found in February or March, booked 79 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 July 3, 2025.

Round-trip from

$658
(Expedia)

One-way from

$354
(Mytrip)

Popular in

August

Cheapest in

February

Average price

$958

Good round-trip deal

$672 or less

Good one-way deal

$701 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. 10% potential increase in price ($96 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Average for round-trip flights in July 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 July 3, 2025.

This Expedia deal was found by Cheapflights users on 7/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1712:40 pmLHR - IAD
2 stops25h 57mMultiple Airlines
Wed 9/175:47 pmIAD - LHR
1 stop13h 33mMultiple Airlines
Deal found 7/3$658
This Finnair deal was found by Cheapflights users on 7/2. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/79:45 amLHR - DCA
1 stop18h 22mFinnair
Sat 9/137:23 pmDCA - LHR
1 stop21h 17mFinnair
Deal found 7/2$658
This deal was found by Cheapflights users on 7/1. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/18:25 amLHR - DCA
1 stop14h 35mJetBlue
Wed 10/296:00 amDCA - LHR
1 stop10h 45mJetBlue
Deal found 7/1$660
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/288:00 amLHR - IAD
1 stop12h 20mTAP AIR PORTUGAL
Wed 9/35:50 pmIAD - LHR
1 stop11h 30mTAP AIR PORTUGAL
Deal found 7/1$661
This Expedia deal was found by Cheapflights users on 7/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2811:45 amLHR - DCA
2 stops16h 56mKLM
Wed 9/104:45 pmDCA - LHR
2 stops13h 00mKLM
Deal found 7/3$662
This Booking.com deal was found by Cheapflights users on 7/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1412:10 pmLHR - IAD
1 stop12h 20mAer Lingus
Sun 11/169:00 pmIAD - LHR
1 stop9h 25mAer Lingus
Deal found 7/3$663
This Booking.com deal was found by Cheapflights users on 7/1. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/89:30 amLHR - DCA
1 stop11h 21mAir Canada
Fri 9/129:40 amDCA - LHR
1 stop15h 50mAir Canada
Deal found 7/1$663
This Scandinavian Airlines deal was found by Cheapflights users on 7/3. 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.
Mon 8/259:05 pmLHR - IAD
2 stops27h 54mScandinavian Airlines
Sun 8/3110:05 pmIAD - LHR
1 stop18h 35mScandinavian Airlines
Deal found 7/3$666
This Austrian Airlines deal was found by Cheapflights users on 7/1. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/286:00 amLHR - IAD
2 stops38h 25mAustrian Airlines
Mon 9/85:16 pmIAD - LHR
2 stops31h 39mAustrian Airlines
Deal found 7/1$667
This The Travel House deal was found by Cheapflights users on 7/2. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/1611:55 amLHR - DCA
1 stop16h 03mIcelandair
Wed 7/308:40 amDCA - LHR
1 stop16h 50mIcelandair
Deal found 7/2$672
This Air Canada deal was found by Cheapflights users on 7/2. 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.
Wed 10/89:30 amLHR - IAD
2 stops11h 58mAir Canada
Mon 10/132:25 pmIAD - LHR
2 stops14h 10mAir Canada
Deal found 7/2$675
This lol.travel deal was found by Cheapflights users on 7/2. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2412:35 pmLHR - IAD
Nonstop8h 25mVirgin Atlantic
Tue 9/25:50 pmIAD - LHR
Nonstop7h 30mVirgin Atlantic
Deal found 7/2$688

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 July 3, 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

Sun 8/17

12:40 pm-9:37 am

2 stops25h 57m

Washington, D.C. Dulles Intl

Wed 9/17

5:47 pm-12:20 pm

1 stop13h 33m

$658

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Sun 9/7

9:45 am-11:07 pm

1 stop18h 22m

Washington, D.C. Reagan-National

Sat 9/13

7:23 pm-9:40 pm

1 stop21h 17m

$658

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 10/1

8:25 am-6:00 pm

1 stop14h 35m

Washington, D.C. Reagan-National

Wed 10/29

6:00 am-8:45 pm

1 stop10h 45m

$660

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 8/28

8:00 am-3:20 pm

1 stop12h 20m

Washington, D.C. Dulles Intl

Wed 9/3

5:50 pm-10:20 am

1 stop11h 30m

$661

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Thu 8/28

11:45 am-11:41 pm

2 stops16h 56m

Washington, D.C. Reagan-National

Wed 9/10

4:45 pm-10:45 am

2 stops13h 00m

$662

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Mon 9/8

9:30 am-3:51 pm

1 stop11h 21m

Washington, D.C. Reagan-National

Fri 9/12

9:40 am-6:30 am

1 stop15h 50m

$663

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 8/25

9:05 pm-7:59 pm

2 stops27h 54m

Washington, D.C. Dulles Intl

Sun 8/31

10:05 pm-9:40 pm

1 stop18h 35m

$666

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 8/28

6:00 am-3:25 pm

2 stops38h 25m

Washington, D.C. Dulles Intl

Mon 9/8

5:16 pm-5:55 am

2 stops31h 39m

$667

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Wed 7/16

11:55 am-10:58 pm

1 stop16h 03m

Washington, D.C. Reagan-National

Wed 7/30

8:40 am-6:30 am

1 stop16h 50m

$672

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 8/7

10:55 am-7:51 pm

1 stop13h 56m

Washington, D.C. Dulles Intl

Sat 8/16

12:13 pm-10:15 am

1 stop17h 02m

$679

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 39 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 27, 2025.

Booking 79 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 $309). Flying from London Heathrow Airport to Washington, D.C. in July is currently the most expensive (average of $345). 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 July 3, 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 16% versus a flight in the morning.

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. Monday mornings 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 July 3, 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 (16 on average).

How much does it cost to fly round-trip from London Heathrow Airport to Washington, D.C.?

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 July 3, 2025.
Read reviews from past customers who have flown Delta, KLM, and Austrian Airlines from London Heathrow Airport to Washington, D.C.. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

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 $658, 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 JetBlue and TAP AIR PORTUGAL - these airlines can fly you to your destination from $660 and $661, respectively. Finnair is 17% 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 JetBlue. According to our data, you can fly for as low as $526. Users have also found prices from $541 and $546 on TAP AIR PORTUGAL and Icelandair, 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: Air Canada (76%), Austrian Airlines (76%), Copa Airlines (76%).

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

    Looking at all options, your cheapest flight can be booked for $597. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $466 on average our data indicates $2,041 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 $309). Flying from London Heathrow Airport to Washington, D.C. in July is currently the most expensive (average of $345). 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
Woodbridge
Alexandria
Tysons
Silver Spring
Fredericksburg
Linthicum Heights
Gaithersburg
Fairfax
Easton
Towson
Waldorf
Laurel
Falls Church
Rockville
Springfield
National Harbor
Manassas
Dundalk
Bowie

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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$390Average$833FlexibilityNo cancel feeOn-time77%
PLAYCheapest$392Average$560FlexibilityNo cancel feeOn-timeN/A
Austrian AirlinesCheapest$431Average$985FlexibilityNo cancel feeOn-time78%
TAP AIR PORTUGALCheapest$473Average$752FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$510Average$986FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$595Average$872FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$619Average$787FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$652Average$816FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$652Average$999FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$682Average$884FlexibilityNo cancel feeOn-time69%

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