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Washington, D.C.

$251+ Cheap flights from London (LON) 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 1/23. Fares are subject to change and may not be available on all flights or dates of travel.
LON — WAS
Dec 17 — Dec 241
Wed 12/17
Wed 12/24
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from London to Washington, D.C. are usually found in February or September, booked 84 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

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

Cheapest flights from London to Washington, D.C.
Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 17, 2025.

This Mytrip deal was found by Cheapflights users on 11/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/48:50 pmLGW - IAD
2 stops26h 40mMultiple Airlines
Wed 12/107:40 pmIAD - LGW
2 stops22h 55mMultiple Airlines
Deal found 11/15$595
This Mytrip deal was found by Cheapflights users on 11/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/48:50 pmLGW - BWI
2 stops26h 50mMultiple Airlines
Wed 12/107:40 pmBWI - LGW
2 stops22h 50mMultiple Airlines
Deal found 11/15$595
This Gotogate deal was found by Cheapflights users on 11/14. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/511:55 amLGW - IAD
1 stop11h 35mIcelandair
Tue 12/167:40 pmIAD - LGW
1 stop10h 15mIcelandair
Deal found 11/14$604
This Gotogate deal was found by Cheapflights users on 11/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1212:15 pmLHR - IAD
1 stop11h 15mIcelandair
Mon 12/157:40 pmIAD - LHR
1 stop10h 10mIcelandair
Deal found 11/15$608
This Gotogate deal was found by Cheapflights users on 11/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:15 pmLHR - IAD
1 stop11h 15mIcelandair
Wed 12/107:40 pmIAD - LHR
1 stop10h 10mIcelandair
Deal found 11/15$610
This Norse deal was found by Cheapflights users on 11/15. 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/212:00 pmLGW - BWI
1 stop32h 24mMultiple Airlines
Mon 11/247:30 amBWI - LGW
1 stop21h 30mMultiple Airlines
Deal found 11/15$610
This Gotogate deal was found by Cheapflights users on 11/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2512:15 pmLHR - IAD
1 stop11h 15mIcelandair
Tue 12/27:40 pmIAD - LHR
1 stop18h 50mIcelandair
Deal found 11/16$611
This FlightHub deal was found by Cheapflights users on 11/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:00 amLHR - IAD
1 stop14h 15mTAP AIR PORTUGAL
Fri 1/910:30 pmIAD - LHR
1 stop18h 05mTAP AIR PORTUGAL
Deal found 11/17$612
This Cheapflightsfares deal was found by Cheapflights users on 11/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/411:55 amLGW - IAD
1 stop11h 35mIcelandair
Wed 12/107:40 pmIAD - LGW
1 stop10h 15mIcelandair
Deal found 11/15$612
This Gotogate deal was found by Cheapflights users on 11/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/28:35 pmLHR - IAD
1 stop26h 55mIcelandair
Sat 12/67:40 pmIAD - LHR
1 stop18h 50mIcelandair
Deal found 11/17$613
This Mytrip deal was found by Cheapflights users on 11/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/268:50 amLGW - IAD
1 stop11h 45mMultiple Airlines
Sun 11/309:00 pmIAD - LGW
1 stop13h 35mMultiple Airlines
Deal found 11/16$613
This Mytrip deal was found by Cheapflights users on 11/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/42:00 pmLGW - BWI
1 stop15h 23mMultiple Airlines
Mon 12/810:40 amBWI - LGW
1 stop18h 20mMultiple Airlines
Deal found 11/14$613

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

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) 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 November 17, 2025.

Most accurate provider

OneTravel
3 stars

Most trusted provider

OneTravel
3 stars

Round-trip from

$581
(The Travel House)

One-way from

$251
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$658

Good round-trip deal

$706 or less

Good one-way deal

$699 or less
Provider with most accurate pricing for London (LON)-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for London (LON)-Washington, D.C. (WAS) flights.
Search Deals
From London (LON) to Washington, D.C. (WAS)
Search Deals
One-way flight from London (LON) to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($101 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from London (LON) to Washington, D.C. (WAS).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London 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 November 17, 2025.
Use the filters below to find and compare flights from London to Washington, D.C. that are best for you.

Fly from

London

Fly to

Washington, D.C.

Route

Depart

Return

Price

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Fri 2/13

11:55 am-3:15 pm

2 stops32h 20m

Washington, D.C. Dulles Intl

Tue 2/17

5:30 pm-11:50 pm

2 stops25h 20m

$605

LondonBaltimore

LTN - BWI

LTNBWI

London Luton

Thu 1/8

9:00 am-6:40 pm

2 stops14h 40m

Baltimore/Washington

Thu 1/15

7:40 pm-4:00 pm

2 stops15h 20m

$605

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Fri 2/6

9:05 pm-6:50 pm

2 stops26h 45m

Washington, D.C. Dulles Intl

Mon 2/16

8:30 pm-4:25 pm

2 stops14h 55m

$608

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Fri 1/9

2:00 pm-11:17 pm

1 stop14h 17m

Baltimore/Washington

Sun 1/11

11:30 am-10:00 am

1 stop17h 30m

$612

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Thu 1/8

11:55 am-6:40 pm

1 stop11h 45m

Baltimore/Washington

Tue 1/27

7:40 pm-10:55 am

1 stop10h 15m

$616

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Thu 3/19

10:20 am-6:15 pm

1 stop11h 55m

Washington, D.C. Dulles Intl

Wed 4/1

8:20 pm-4:00 pm

1 stop14h 40m

$616

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Wed 1/7

11:55 am-6:40 pm

1 stop11h 45m

Baltimore/Washington

Tue 1/27

7:40 pm-10:55 am

1 stop10h 15m

$616

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Thu 1/8

11:55 am-6:40 pm

1 stop11h 45m

Baltimore/Washington

Sun 1/25

7:40 pm-10:55 am

1 stop10h 15m

$616

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Thu 1/8

11:55 am-6:40 pm

1 stop11h 45m

Baltimore/Washington

Wed 1/28

7:40 pm-10:55 am

1 stop10h 15m

$616

LondonWashington, D.C.

STN - IAD

STNIAD

London Stansted

Sat 2/14

8:10 pm-4:05 pm

2 stops24h 55m

Washington, D.C. Dulles Intl

Sat 2/21

6:50 pm-11:35 pm

2 stops23h 45m

$625

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/17

Showing 1-10 of 60 results
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Compare providers for flights from London to Washington, D.C.

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Washington, D.C. in November.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*1 star
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
OneTravelPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
Trip.comPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London-Washington, D.C. flights, users find the pricing of OneTravel to be most consistent on Cheapflights vs. OneTravel Users can find the same prices on London-Washington, D.C. flight deals on Cheapflights vs. OneTravel >95% of the time. Price accuracy is based on data collected from London-Washington, D.C. flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London-Washington, D.C. flights, Cheapflights users trust OneTravel the most. OneTravel has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from London 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 to Washington, D.C.

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

Use this chart to determine the optimal time to book a round-trip flight from London to Washington, D.C.. Price data was last updated on November 14, 2025.

To ensure you get the cheapest price possible for a flight from London to Washington, D.C., you should look to book at least 57 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, February is the cheapest month in which you can book a flight from London to Washington, D.C. (average of $305). Flying from London to Washington, D.C. in July is currently the most expensive (average of $641). 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 LON to WAS?

Find hourly flight availability from London 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 November 17, 2025.

A simple way to save on the total cost of your ticket is to fly from London to Washington, D.C. in the morning. If you’re flexible enough to do this you can expect to save up to 33% on your trip compared to booking a flight at noon.

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

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

Travelers seeking maximum savings on their London to Washington, D.C. flight should consider departing on Saturday 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 to Washington, D.C.

Explore weekly flight availability from London 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 November 17, 2025.

The most flights from LON to WAS are scheduled on a Monday (26 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (22 on average).

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

What’s the top layover airport for flights from London to Washington, D.C.?

Share of 1-stop round-trip flights from London to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same layover each way.

Dublin (DUB) – chosen by Cheapflights users on 44% of 1-stop itineraries from London to Washington, D.C. on Cheapflights.

What’s the cheapest layover airport for flights from London to Washington, D.C.?

Average round-trip fare for 1-stop flights from London to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same layover each way.

Dublin (DUB) is the most affordable 1-stop option, with an average round-trip price of $519.

What’s the fastest layover option from London to Washington, D.C.?

Shortest average travel time for 1-stop one-way flights from London to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 11h 00m.

Which airport typically offers the quickest layover for flights from London to Washington, D.C.?

Average layover duration for 1-stop one-way flights from London to Washington, D.C., chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 21m.

The best insider tips for London 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 to Washington, D.C. trip
Airlines
British Airways

BA's Club Suite offers private pods with doors for enhanced privacy on long-haul flights.


BA's World Traveller Plus provides extra seat width, legroom, and upgraded service on long-haul flights.

Read more about British Airwaysby Gabriel Leigh
United Airlines

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


United's Premium Plus offers bigger seats, extra legroom, and upgraded meals on international flights.

Read more about United Airlinesby Harriet Baskas
Airports
LHR

Heathrow's strict security can cause delays. Ensure all liquids are in a single bag and remove suspicious items to avoid long waits.

Read more about LHRby Ramsey Qubein
IAD

Use the Silver Line Metro for a cost-effective trip to Washington, D.C. It takes under 40 minutes and is five minutes from the terminal.

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

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 November 17, 2025.
Read through reviews of airlines operating flights from London to Washington, D.C., such as Delta, Virgin Atlantic, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,006 reviews

Overall

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,006 reviews
Delta
7.9
Good
8,006 reviews

Overall

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Virgin Atlantic
7.5
Good
673 reviews
Delta
7.9
Good
8,006 reviews

Overall

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,014 reviews
Delta
7.9
Good
8,006 reviews

Overall

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
PLAY
7.0
Good
Delta
7.9
Good
8,006 reviews

Overall

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
British Airways
6.7
Okay
7,529 reviews
Delta
7.9
Good
8,006 reviews

Overall

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.1

Comfort

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from London 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.

  • How long is the flight from London to Washington, D.C.?

    For as low as $616, Scandinavian Airlines can have you in Washington, D.C. from London in 11h 45m. The distance from London to Washington, D.C. is about 3641 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from London to Washington, D.C. round-trip?

    Flying on Delta is currently your cheapest option to Washington, D.C., with prices starting at $320. Additional round-trip tickets that might be worth considering are offered by Scandinavian Airlines and Austrian Airlines, with the lowest prices starting at $390 and $431, respectively. These flights start at 55% lower than the current average price 3 months from now.

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

    While some choose either London Heathrow - Baltimore/Washington or London Gatwick - Washington, D.C. Dulles Intl, London Heathrow - Washington, D.C. Dulles Intl is the most popular route from London to Washington, D.C..

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

    Before booking your flight to Washington, D.C. from London, check out the most reliable airlines to get you to your destination on time: KLM (95%), Air France (93%), Delta( 93%).

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

    Looking at all options, your cheapest flight can be booked for $583. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $426 on average, our data indicates $1,706 when flying from London to Washington, D.C..

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

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

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

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

    Yes. Cheapflights offers flight deals from London 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 to Washington, D.C.?

    Currently, February is the cheapest month in which you can book a flight from London to Washington, D.C. (average of $305). Flying from London to Washington, D.C. in July is currently the most expensive (average of $641). 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 Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Tysons
Woodbridge
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Waldorf
Bowie
Largo
McLean

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.

Alternative routes for London to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Dulles Intl flights
Gatwick to Dulles Intl flights
Heathrow to Reagan-National flights
London City to Dulles Intl flights
Stansted to Dulles Intl flights
Gatwick to Reagan-National flights
Luton to Dulles Intl flights
Edinburgh to Dulles Intl flights
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Top 10 airlines flying from London to Washington, D.C.

Discover the top 10 airlines that operate flights from London 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 November 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$320Average$968FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$390Average$833FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$431Average$858FlexibilityNo cancel feeOn-time78%
TAP AIR PORTUGALCheapest$473Average$714FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$510Average$701FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$562Average$738FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$567Average$822FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$594Average$837FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$635Average$663FlexibilityNo cancel feeOn-time67%
LufthansaCheapest$649Average$873FlexibilityNo cancel feeOn-time76%

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