London

$198+ Cheap flights from Washington, D.C. (WAS) to London (LON)

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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LON
Jan 22 — Jan 291
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Cheapflights Tip: The best prices from Washington, D.C. to London are usually found in September or January, booked 37 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

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

Cheapest flights from Washington, D.C. to London
Explore the most affordable flight options available from Washington, D.C. to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/22. 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.
Tue 12/307:40 pmIAD - LHR
1 stop10h 10mIcelandair
Tue 1/1312:15 pmLHR - IAD
1 stop11h 15mIcelandair
Deal found 12/22$582
This CrystalTravel deal was found by Cheapflights users on 12/21. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:40 pmIAD - LHR
1 stop18h 50mIcelandair
Thu 1/2212:15 pmLHR - IAD
1 stop11h 15mIcelandair
Deal found 12/21$614
This Trip.com deal was found by Cheapflights users on 12/20. 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 12/3110:30 pmIAD - LGW
1 stop30h 20mTAP AIR PORTUGAL
Wed 1/144:35 pmLGW - IAD
1 stop27h 40mTAP AIR PORTUGAL
Deal found 12/20$639
This Priceline deal was found by Cheapflights users on 12/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:15 pmDCA - LHR
1 stop31h 40mJetBlue
Sat 1/109:20 amLHR - DCA
1 stop30h 49mJetBlue
Deal found 12/21$639
This TAP AIR PORTUGAL deal was found by Cheapflights users on 12/21. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:30 pmIAD - LHR
1 stop12h 00mTAP AIR PORTUGAL
Wed 1/141:40 pmLHR - IAD
1 stop30h 35mTAP AIR PORTUGAL
Deal found 12/21$640
This CheapOair deal was found by Cheapflights users on 12/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:15 amDCA - LHR
1 stop22h 15mJetBlue
Fri 1/912:20 pmLHR - DCA
1 stop15h 39mJetBlue
Deal found 12/21$645
This oojo deal was found by Cheapflights users on 12/21. 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.
Mon 12/297:40 pmIAD - LHR
1 stop18h 50mIcelandair
Sun 1/118:35 pmLHR - IAD
1 stop26h 55mIcelandair
Deal found 12/21$658
This CheapOair deal was found by Cheapflights users on 12/21. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:15 amDCA - LHR
1 stop22h 15mJetBlue
Sun 1/117:45 amLHR - DCA
1 stop20h 14mJetBlue
Deal found 12/21$660
This Cheapflightsfares deal was found by Cheapflights users on 12/21. 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.
Mon 12/296:20 pmIAD - LHR
Nonstop7h 20mMultiple Airlines
Thu 1/229:00 amLHR - IAD
1 stop12h 40mMultiple Airlines
Deal found 12/21$685
This Cheapflightsfares deal was found by Cheapflights users on 12/21. 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.
Wed 12/316:20 pmIAD - LHR
Nonstop7h 20mLufthansa
Wed 1/147:40 amLHR - IAD
1 stop12h 55mLufthansa
Deal found 12/21$690
This Cheapflightsfares deal was found by Cheapflights users on 12/22. 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.
Wed 12/316:20 pmIAD - LHR
Nonstop7h 20mMultiple Airlines
Wed 1/146:00 amLHR - IAD
1 stop13h 40mMultiple Airlines
Deal found 12/22$698
This Cheapflightsfares deal was found by Cheapflights users on 12/21. 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 12/257:40 pmIAD - LHR
1 stop10h 10mIcelandair
Fri 1/1612:15 pmLHR - IAD
1 stop11h 15mIcelandair
Deal found 12/21$701

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

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to London (LON). 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 December 23, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$567
(CrystalTravel)

One-way from

$198
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$986

Good round-trip deal

$642 or less

Good one-way deal

$435 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-London (LON) flight deals.
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-London (LON) flights.
From Washington, D.C. (WAS) to London (LON)
One-way flight from Washington, D.C. (WAS) to London (LON)
Highest demand for flights based on searches. 6% potential increase in price ($54 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Average for round-trip flights in December 2025
Price to beat on a round-trip flight from Washington, D.C. (WAS) to London (LON).
Price to beat on a one-way flight from Washington, D.C. (WAS) to London (LON).

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to London 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 December 23, 2025.
Use the filters below to find and compare flights from Washington, D.C. to London that are best for you.

Fly from

Washington, D.C.

Fly to

London

Route

Depart

Return

Price

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Thu 2/26

8:30 pm-4:25 pm

2 stops14h 55m

London Heathrow

Thu 3/5

10:20 am-5:15 pm

1 stop11h 55m

$576

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Thu 1/29

5:30 pm-9:50 am

1 stop11h 20m

London Gatwick

Sun 2/1

9:05 am-9:00 pm

2 stops16h 55m

$578

Washington, D.C.London

IAD - LTN

IADLTN

Washington, D.C. Dulles Intl

Mon 1/12

8:30 pm-6:15 pm

2 stops16h 45m

London Luton

Sun 1/18

8:30 am-3:20 pm

2 stops35h 50m

$580

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Fri 1/23

10:30 pm-3:45 pm

1 stop12h 15m

London Gatwick

Sat 1/31

10:10 am-9:00 pm

2 stops39h 50m

$581

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Sat 1/24

5:30 pm-9:50 am

1 stop11h 20m

London Gatwick

Sat 1/31

10:10 am-9:00 pm

2 stops39h 50m

$581

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 1/24

8:30 pm-6:50 pm

2 stops17h 20m

London Heathrow

Tue 2/3

9:05 pm-5:15 pm

2 stops25h 10m

$583

BaltimoreLondon

BWI - LTN

BWILTN

Baltimore/Washington

Wed 2/4

7:40 pm-12:55 pm

1 stop12h 15m

London Luton

Wed 2/11

8:00 am-6:40 pm

1 stop15h 40m

$586

BaltimoreLondon

BWI - LTN

BWILTN

Baltimore/Washington

Wed 2/25

7:40 pm-12:55 pm

1 stop12h 15m

London Luton

Mon 3/2

8:00 am-6:40 pm

1 stop15h 40m

$588

Washington, D.C.London

IAD - LGW

IADLGW

Washington, D.C. Dulles Intl

Wed 1/14

6:10 pm-5:50 pm

2 stops18h 40m

London Gatwick

Mon 1/19

6:40 pm-4:40 pm

1 stop27h 00m

$592

Washington, D.C.London

IAD - LHR

IADLHR

Washington, D.C. Dulles Intl

Sat 2/14

10:15 pm-10:50 am

Nonstop7h 35m

London Heathrow

Sun 3/1

6:50 am-2:35 pm

1 stop12h 45m

$614

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

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

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 Washington, D.C. to London in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
GotogatePrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy2 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*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 Washington, D.C.-London flights, users find the pricing of Gotogate to be most consistent on Cheapflights vs. Gotogate Users can find the same prices on Washington, D.C.-London flight deals on Cheapflights vs. Gotogate >95% of the time. Price accuracy is based on data collected from Washington, D.C.-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-London flights, Cheapflights users trust Gotogate the most. Gotogate 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 Washington, D.C.-London 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 Washington, D.C. to London

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

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

Use this chart to determine the optimal time to book a round-trip flight from Washington, D.C. to London. Price data was last updated on December 19, 2025.

The best time to book flights from Washington, D.C. to London is 37 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to London (average of $31). Flying from Washington, D.C. to London in June is currently the most expensive (average of $728). 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 WAS to LON?

Find hourly flight availability from Washington, D.C. to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 23, 2025.

A simple way to save on the total cost of your ticket is to fly from Washington, D.C. to London in the afternoon. If you’re flexible enough to do this you can expect to save up to 21% on your trip compared to booking a flight at noon.

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

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

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

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

Explore weekly flight availability from Washington, D.C. to London. 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 December 23, 2025.

The most flights from WAS to LON are scheduled on a Monday (26 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (19 on average).

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

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

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

Reykjavik (KEF) – chosen by Cheapflights users on 68% of 1-stop itineraries from Washington, D.C. to London on Cheapflights.

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

Average round-trip fare for 1-stop flights from Washington, D.C. to London, 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 $479.

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

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

Flights via Montreal (YUL) have the shortest average one-way travel time for 1-stop routes: 9h 20m.

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

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

Flights via Montreal (YUL) offer the fastest connection on this route, with an average layover time of 1h 24m.

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

About 21% of weekly flights between Washington, D.C. and London have experienced delays in the past year, with the average delay time being 159 minutes.

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

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

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

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

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

Over the last year, Virgin Atlantic have had the lowest number of delays on this route, with just 15% of flights being delayed.

The best insider tips for Washington, D.C. to London 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 Washington, D.C. to London trip
Airports
IAD

Expect long security queues at IAD, especially in the afternoon and evening. Arrive early to navigate the check-in and security process smoothly.

LHR

For a quick trip to central London, take the Heathrow Express to Paddington Station. It's the fastest option from LHR.

Our travel experts
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 London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated December 23, 2025.
See what other customers who have flown with United Airlines, American Airlines, and Icelandair from Washington, D.C. to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Boarding

7.7

Food

6.6

Comfort

7.3

Entertainment

7.1

Overall

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to London. 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 Washington, D.C. to London?

    There are many flights that can get you from Washington, D.C. to London in 7h 35m. Fly via Scandinavian Airlines, TAP AIR PORTUGAL, or United Airlines to get the fastest option. Washington, D.C. and London are separated by a distance of 3664 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Flying on JetBlue is currently your cheapest option to London, with prices starting at $31. Additional round-trip tickets that might be worth considering are offered by TAP AIR PORTUGAL and Icelandair, with the lowest prices starting at $395 and $428, respectively. JetBlue is 95% cheaper than the average price of flights available within the next 90 days to this destination.

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

    $182 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on Scandinavian Airlines and TAP AIR PORTUGAL, with prices starting from $213 and $222, respectively.

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

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

    The top 3 most reliable airlines when flying from Washington, D.C. to London are KLM (95%), Air France (92%) and Delta (92%).

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

    While on average a flight from Washington, D.C. to London is generally $2,116, our data shows the cheapest flight currently is $350. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay $417 for that flight.

  • Where are the most common layover locations when flying from Washington, D.C. to London?

  • What are some popular things to do or see while on a layover in Reykjavik?

    The majority of Reykjavik visitors spend their time at Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool. Those on a layover in Reykjavik interested in visiting Hallgrímskirkja, Harpa, or Laugardalslaug Geothermal Pool can do so by traveling 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Travelers can book a car rental at Reykjavik Keflavik Intl for about $49 per day to make their sightseeing more efficient.

  • What are some popular points of interest to see during a layover in New York?

    Times Square, New York City Center, and Madison Square Garden are the most popular attractions in New York if you're in need of something to do during your layover. Travelers on a layover in New York can visit Times Square, New York City Center, and Madison Square Garden, by traveling 13.6 mi, 13.6 mi, and 13.6 mi, respectively after landing at New York John F Kennedy Intl. Travelers can book a car rental at New York John F Kennedy Intl for about $58 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Washington, D.C. to London flights?

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to London (average of $31). Flying from Washington, D.C. to London in June is currently the most expensive (average of $728). 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?

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

Discover the top 10 airlines that operate flights from Washington, D.C. to London. 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 December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$31Average$811FlexibilityNo cancel feeOn-time62%
PLAYCheapest$369Average$511FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$395Average$566FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$429Average$641FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$429Average$593FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$447Average$1,061FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$497Average$842FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$497Average$846FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$506Average$834FlexibilityNo cancel feeOn-time69%
KLMCheapest$520Average$615FlexibilityNo cancel feeOn-time75%

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