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$586+ Cheap flights from Washington, D.C. (WAS) to London, ON (YXU)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/29. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YXU
Nov 15 — Nov 221
Sat 11/15
Sat 11/22
1 adult, Economy
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Cheap 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 (YXU). 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 October 16, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$586
(Expedia)
Provider with most accurate pricing for Washington, D.C. (WAS)-London flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-London flights.
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From Washington, D.C. (WAS) to London
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Find 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 October 16, 2025.

This Expedia deal was found by Cheapflights users on 10/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2911:05 amDCA - YXU
2 stops10h 16mAir Canada
Sat 12/65:15 amYXU - DCA
2 stops10h 16mAir Canada
Deal found 10/15$586
This Air Canada deal was found by Cheapflights users on 10/16. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/304:30 pmIAD - YXU
1 stop4h 51mAir Canada
Sun 12/79:25 amYXU - IAD
1 stop6h 21mAir Canada
Deal found 10/16$593
This Air Canada deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/284:30 pmIAD - YXU
1 stop4h 51mAir Canada
Fri 12/59:25 amYXU - IAD
1 stop6h 21mAir Canada
Deal found 10/13$594
This Air Canada deal was found by Cheapflights users on 10/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/139:45 amIAD - YXU
2 stops7h 20mAir Canada
Thu 11/209:25 amYXU - IAD
1 stop6h 21mAir Canada
Deal found 10/14$599
This Air Canada deal was found by Cheapflights users on 10/14. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:50 pmDCA - YXU
1 stop13h 56mAir Canada
Thu 11/205:40 pmYXU - DCA
1 stop4h 55mAir Canada
Deal found 10/14$617
This Air Canada deal was found by Cheapflights users on 10/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/146:00 amDCA - YXU
2 stops15h 21mAir Canada
Sat 11/155:40 pmYXU - DCA
1 stop4h 55mAir Canada
Deal found 10/15$654
This United Airlines deal was found by Cheapflights users on 10/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/304:30 pmIAD - YXU
1 stop4h 51mUnited Airlines
Sun 12/79:25 amYXU - IAD
1 stop6h 21mUnited Airlines
Deal found 10/16$679
This United Airlines deal was found by Cheapflights users on 10/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/139:05 amDCA - YXU
2 stops8h 00mUnited Airlines
Thu 11/205:40 pmYXU - DCA
1 stop4h 55mUnited Airlines
Deal found 10/14$689
This United deal was found by Cheapflights users on 10/14. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:00 amDCA - YXU
2 stops10h 05mMultiple Airlines
Thu 11/205:15 amYXU - DCA
2 stops10h 16mMultiple Airlines
Deal found 10/14$694
This United deal was found by Cheapflights users on 10/14. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:00 amIAD - YXU
2 stops11h 05mMultiple Airlines
Thu 11/209:25 amYXU - IAD
2 stops6h 56mMultiple Airlines
Deal found 10/14$694
This United Airlines deal was found by Cheapflights users on 10/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/309:40 amDCA - YXU
1 stop7h 25mUnited Airlines
Sun 12/75:40 pmYXU - DCA
1 stop4h 55mUnited Airlines
Deal found 10/16$703
This United Airlines deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/287:30 amDCA - YXU
2 stops9h 35mUnited Airlines
Fri 12/59:25 amYXU - DCA
2 stops9h 42mUnited Airlines
Deal found 10/13$705

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 October 16, 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

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Sat 11/29

11:05 am-9:21 pm

2 stops10h 16m

London

Sat 12/6

5:15 am-3:31 pm

2 stops10h 16m

$586

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sun 11/30

4:30 pm-9:21 pm

1 stop4h 51m

London

Sun 12/7

9:25 am-3:46 pm

1 stop6h 21m

$593

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 11/28

4:30 pm-9:21 pm

1 stop4h 51m

London

Fri 12/5

9:25 am-3:46 pm

1 stop6h 21m

$594

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 11/13

9:45 am-5:05 pm

2 stops7h 20m

London

Thu 11/20

9:25 am-3:46 pm

1 stop6h 21m

$599

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Thu 11/13

6:50 pm-8:46 am

1 stop13h 56m

London

Thu 11/20

5:40 pm-10:35 pm

1 stop4h 55m

$617

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Sun 11/30

6:50 pm-8:46 am

1 stop13h 56m

London

Sun 12/7

5:15 am-8:55 am

1 stop3h 40m

$617

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Fri 11/28

6:59 am-5:05 pm

1 stop10h 06m

London

Fri 12/5

5:40 pm-10:35 pm

1 stop4h 55m

$617

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Wed 4/1

6:59 am-5:03 pm

1 stop10h 04m

London

Sat 4/11

5:40 pm-10:39 pm

1 stop4h 59m

$617

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Fri 11/14

6:00 am-9:21 pm

2 stops15h 21m

London

Sat 11/15

5:40 pm-10:35 pm

1 stop4h 55m

$654

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sun 11/30

4:30 pm-9:21 pm

1 stop4h 51m

London

Sun 12/7

9:25 am-3:46 pm

1 stop6h 21m

$679

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

Showing 1-10 of 21 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 October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 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 Washington, D.C.-London, Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-London, Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-London, Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C.-London, Ontario 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 Washington, D.C.-London, Ontario 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

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

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to London, Ontario (average of $98). Flying from Washington, D.C. to London, Ontario in October is currently the most expensive (average of $205). 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.

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.

  • What airport do you fly into for flights to London from Washington, D.C.?

    London (YXU), located 5.3 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. to London. 0 airlines have flights to London from Washington, D.C. on a regular basis. Booking flights from Washington, D.C. to London should not be difficult; the airport handles an average of 0 inbound flights from Washington, D.C. per day.

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

    A quick flight from Washington, D.C. to London, Ontario can take about 10h 16m. Air Canada provides one of the quickest options available for as low as $586. Washington, D.C. and London, Ontario are separated by a distance of 359 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    The most popular route from Washington, D.C. to London, Ontario is Washington, D.C. Reagan-National - London. You may also consider Baltimore/Washington - London or Washington, D.C. Dulles Intl - London.

  • 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, Ontario?

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. to London, Ontario (average of $98). Flying from Washington, D.C. to London, Ontario in October is currently the most expensive (average of $205). 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.

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