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Washington, D.C.

$437+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
LON — WAS
Aug 8 — Aug 151
Sat 8/8
Sat 8/15
1 adult, Economy
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Find cheap flights from London to Washington, D.C. with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from London to Washington, D.C. are usually found in February or January, booked 57 days in advance, depart on a Thursday or Wednesday and return on a Wednesday

Cheap 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 July 9, 2026.

This The Travel House deal was found by Cheapflights users on 7/7. 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.
Fri 10/233:40 pm
LGW
-
IAD
1 stop32h 40m
Icelandair
Sat 10/318:40 pm
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 7/7$586
This oojo deal was found by Cheapflights users on 7/5. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1311:55 am
LGW
-
IAD
1 stop11h 35m
Icelandair
Thu 1/77:40 pm
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 7/5$587
This Gotogate deal was found by Cheapflights users on 7/6. 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.
Sat 10/3111:55 am
LGW
-
IAD
1 stop11h 35m
Icelandair
Sat 11/77:40 pm
IAD
-
LGW
1 stop10h 15m
Icelandair
Deal found 7/6$589
This Gotogate deal was found by Cheapflights users on 7/7. 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 9/1711:20 am
LHR
-
IAD
1 stop14h 15m
TAP AIR PORTUGAL
Sun 9/275:40 pm
IAD
-
LHR
1 stop11h 40m
TAP AIR PORTUGAL
Deal found 7/7$590
This Flightnetwork deal was found by Cheapflights users on 7/6. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/311:20 am
LHR
-
IAD
1 stop14h 15m
TAP AIR PORTUGAL
Thu 9/1710:35 pm
IAD
-
LHR
1 stop14h 10m
TAP AIR PORTUGAL
Deal found 7/6$592
This TravelUp deal was found by Cheapflights users on 7/9. 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 9/2910:35 am
LGW
-
IAD
1 stop15h 00m
TAP AIR PORTUGAL
Sat 10/105:05 pm
IAD
-
LGW
1 stop11h 40m
TAP AIR PORTUGAL
Deal found 7/9$592
This TravelUp deal was found by Cheapflights users on 7/9. 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.
Fri 9/46:00 am
LHR
-
IAD
1 stop19h 35m
TAP AIR PORTUGAL
Mon 9/145:40 pm
IAD
-
LHR
1 stop14h 05m
TAP AIR PORTUGAL
Deal found 7/9$593
This TravelUp deal was found by Cheapflights users on 7/8. 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.
Wed 9/210:35 am
LGW
-
IAD
1 stop15h 00m
TAP AIR PORTUGAL
Tue 9/85:05 pm
IAD
-
LGW
1 stop11h 40m
TAP AIR PORTUGAL
Deal found 7/8$593
This Mytrip deal was found by Cheapflights users on 7/8. 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 9/245:40 am
LTN
-
IAD
2 stops19h 55m
Multiple Airlines
Mon 9/2810:35 pm
IAD
-
LTN
2 stops19h 25m
Multiple Airlines
Deal found 7/8$594
This TravelUp deal was found by Cheapflights users on 7/7. 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 10/611:20 am
LHR
-
IAD
1 stop14h 15m
TAP AIR PORTUGAL
Tue 10/1310:35 pm
IAD
-
LHR
1 stop15h 15m
TAP AIR PORTUGAL
Deal found 7/7$594
This Kiwi.com deal was found by Cheapflights users on 7/9. 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.
Fri 9/182:00 pm
LGW
-
IAD
1 stop34h 09m
Multiple Airlines
Thu 10/17:00 am
IAD
-
LGW
2 stops22h 00m
Multiple Airlines
Deal found 7/9$594
This Gotogate deal was found by Cheapflights users on 7/7. 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 11/612:25 pm
LHR
-
IAD
1 stop13h 10m
TAP AIR PORTUGAL
Wed 11/1110:30 pm
IAD
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Deal found 7/7$595

Find 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 July 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$586
(The Travel House)

One-way from

$437
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$755

Good round-trip deal

$705 or less

Good one-way deal

$473 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. 9% potential increase in price ($70 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
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 July 9, 2026.
Use the filters below to find and compare flights from London to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonBaltimore

STN - BWI

STNBWI

London Stansted

Thu 9/24

7:20 am-10:15 pm

2 stops19h 55m

Baltimore/Washington

Tue 9/29

8:30 pm-12:10 am

2 stops22h 40m

$660

LondonBaltimore

LGW - BWI

LGWBWI

London Gatwick

Thu 8/27

3:40 pm-10:15 pm

1 stop11h 35m

Baltimore/Washington

Mon 8/31

8:30 pm-11:45 am

1 stop10h 15m

$674

LondonWashington, D.C.

LGW - DCA

LGWDCA

London Gatwick

Wed 9/2

12:20 pm-7:07 pm

1 stop11h 47m

Washington, D.C. Reagan-National

Mon 9/7

5:00 pm-9:35 am

1 stop11h 35m

$676

LondonBaltimore

STN - BWI

STNBWI

London Stansted

Sat 10/24

8:35 am-10:15 pm

2 stops18h 40m

Baltimore/Washington

Wed 10/28

8:40 pm-11:35 pm

2 stops22h 55m

$678

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 8/24

8:40 am-4:45 pm

1 stop13h 05m

Washington, D.C. Dulles Intl

Thu 9/10

6:35 pm-6:55 am

Nonstop7h 20m

$687

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 8/31

6:00 am-2:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

Mon 9/14

6:35 pm-6:55 am

Nonstop7h 20m

$688

LondonWashington, D.C.

LHR - IAD

LHRIAD

London Heathrow

Mon 10/5

9:30 am-4:05 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Tue 10/20

12:38 pm-10:00 am

2 stops16h 22m

$695

LondonBaltimore

STN - BWI

STNBWI

London Stansted

Thu 10/22

7:20 am-10:15 pm

2 stops19h 55m

Baltimore/Washington

Thu 10/29

8:40 pm-9:55 pm

2 stops21h 15m

$695

LondonBaltimore

LHR - BWI

LHRBWI

London Heathrow

Fri 10/9

4:25 pm-7:40 pm

Nonstop8h 15m

Baltimore/Washington

Wed 10/14

5:48 pm-9:25 am

1 stop10h 37m

$701

LondonWashington, D.C.

LHR - DCA

LHRDCA

London Heathrow

Sun 12/13

4:30 pm-11:59 pm

1 stop12h 29m

Washington, D.C. Reagan-National

Thu 1/7

3:30 pm-6:15 am

1 stop9h 45m

$705

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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 July.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*2 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
Trip.comPrice Accuracy1 starTrust 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Washington, D.C. flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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.

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

Currently, September is the cheapest month in which you can book a flight from London to Washington, D.C. (average of $597). Flying from London to Washington, D.C. in May is currently the most expensive (average of $834). 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 July 9, 2026.

When flying from London to Washington, D.C., the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 July 9, 2026.

The most flights from LON to WAS are scheduled on a Monday (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (21 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 40% 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.

Lisbon (LIS) is the most affordable 1-stop option, with an average round-trip price of $509.

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 05m.

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 Lisbon (LIS) offer the fastest connection on this route, with an average layover time of 1h 23m.

How often are flights from London to Washington, D.C. delayed?

About 18% of weekly flights between London and Washington, D.C. have experienced delays in the past year, with the average delay time being 137 minutes.

What is the most punctual flight time for London to Washington, D.C. flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Washington, D.C. flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 11% of flights being delayed.

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

To ensure you get the cheapest price possible for a flight from London to Washington, D.C., you should look to book at least 81 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.

The best insider tips for London to Washington, D.C. flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your London to Washington, D.C. trip
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

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 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

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 July 9, 2026.
Read through reviews of airlines operating flights from London to Washington, D.C., such as Delta,Virgin Atlantic, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

7.8

Entertainment

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
Delta
7.8
Good
8,453 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

7.8

Entertainment

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
Virgin Atlantic
7.5
Good
693 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

7.8

Entertainment

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
United Airlines
7.4
Good
9,963 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

7.8

Entertainment

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
American Airlines
7.1
Good
11,796 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

7.8

Entertainment

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
British Airways
6.7
Okay
8,106 reviews
Delta
7.8
Good
8,453 reviews

Comfort

7.8

Boarding

8.1

Crew

8.5

Overall

7.8

Entertainment

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,

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 $674, TAP AIR PORTUGAL can have you in Washington, D.C. from London in 11h 35m. 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 Icelandair and Austrian Airlines, with the lowest prices starting at $466 and $534, respectively. These flights start at 54% lower than the current average price 3 months from now.

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

    One-way options have recently been found by users for as low as $334 on Virgin Atlantic. Other airlines that offer cheap prices include Aer Lingus from $445 and JetBlue from $455 one-way.

  • 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: Air Canada (88%), Austrian Airlines (88%), Copa Airlines( 88%).

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

    Looking at all options, your cheapest flight can be booked for $466. While the most popular route (London Heathrow - Washington, D.C. Dulles Intl) can be booked for $561 on average, our data indicates $4,856 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, September is the cheapest month in which you can book a flight from London to Washington, D.C. (average of $597). Flying from London to Washington, D.C. in May is currently the most expensive (average of $834). 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
Arlington
Tysons
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Manassas
Falls Church
Fredericksburg
Hanover
Laurel
Silver Spring
Clinton
Hunt Valley
Cordova
Woodbridge

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 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 July 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$320Average$908FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$466Average$711FlexibilityNo cancel feeOn-time76%
Austrian AirlinesCheapest$534Average$719FlexibilityNo cancel feeOn-time78%
LufthansaCheapest$536Average$740FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$559Average$796FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$566Average$748FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$567Average$772FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$635Average$663FlexibilityNo cancel feeOn-time67%
Aer LingusCheapest$658Average$783FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$670Average$797FlexibilityNo cancel feeOn-time72%

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