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$302+ Cheap flights from Washington, D.C. (WAS) to London, ON (YXU)

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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YXU
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
1 adult, Economy
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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 March 22, 2026.

This Gotogate deal was found by Cheapflights users on 3/22. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:59 am
DCA
-
YXU
1 stop4h 44m
Air Canada
Wed 5/1312:20 pm
YXU
-
DCA
1 stop5h 53m
Air Canada
Deal found 3/22$563
This Gotogate deal was found by Cheapflights users on 3/22. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/69:45 am
IAD
-
YXU
2 stops7h 48m
Air Canada
Wed 5/139:30 am
YXU
-
IAD
1 stop5h 59m
Air Canada
Deal found 3/22$571
This Mytrip deal was found by Cheapflights users on 3/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:59 am
DCA
-
YXU
3 stops22h 21m
Multiple Airlines
Wed 5/135:10 am
YXU
-
DCA
2 stops6h 51m
Multiple Airlines
Deal found 3/22$638
This Air Canada deal was found by Cheapflights users on 3/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:59 am
DCA
-
YXU
1 stop4h 44m
Air Canada
Sat 5/912:20 pm
YXU
-
DCA
1 stop5h 53m
Air Canada
Deal found 3/17$661
This Air Canada deal was found by Cheapflights users on 3/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/14:05 pm
IAD
-
YXU
1 stop5h 33m
Air Canada
Sat 5/99:30 am
YXU
-
IAD
1 stop5h 59m
Air Canada
Deal found 3/20$661
This Air Canada deal was found by Cheapflights users on 3/19. 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 4/306:00 am
DCA
-
YXU
2 stops11h 04m
Air Canada
Sat 5/212:20 pm
YXU
-
DCA
1 stop5h 53m
Air Canada
Deal found 3/19$670
This Air Canada deal was found by Cheapflights users on 3/18. 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.
Sat 5/212:45 pm
DCA
-
YXU
2 stops8h 53m
Air Canada
Sat 5/95:40 am
YXU
-
DCA
2 stops6h 21m
Air Canada
Deal found 3/18$672
This Air Canada deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/299:00 am
IAD
-
YXU
1 stop8h 04m
Air Canada
Sat 5/29:30 am
YXU
-
IAD
1 stop5h 59m
Air Canada
Deal found 3/19$686
This Air Canada deal was found by Cheapflights users on 3/19. 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 5/39:45 am
IAD
-
YXU
2 stops7h 48m
Air Canada
Sun 5/109:30 am
YXU
-
IAD
1 stop5h 59m
Air Canada
Deal found 3/19$703
This United Airlines deal was found by Cheapflights users on 3/18. 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.
Wed 4/2910:30 pm
IAD
-
YXU
2 stops18h 34m
United Airlines
Sat 5/29:30 am
YXU
-
IAD
2 stops8h 00m
United Airlines
Deal found 3/18$737
This Kiwi.com deal was found by Cheapflights users on 3/18. 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.
Sat 5/27:00 am
BWI
-
YXU
1 stop8h 35m
Multiple Airlines
Sat 5/96:10 am
YXU
-
BWI
2 stops38h 13m
Multiple Airlines
Deal found 3/18$799
This United Airlines deal was found by Cheapflights users on 3/18. 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.
Sat 5/26:15 am
BWI
-
YXU
2 stops15h 23m
United Airlines
Sat 5/95:40 am
YXU
-
BWI
2 stops15h 22m
United Airlines
Deal found 3/18$880

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 (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 March 22, 2026.

Round-trip from

$563
(Gotogate)

One-way from

$302
(Air Canada)
From Washington, D.C. (WAS) to London
Search Deals
One-way flight from Washington, D.C. (WAS) to London
Search Deals

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 March 22, 2026.
Use the filters below to find and compare flights from Washington, D.C. to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Wed 5/6

6:59 am-11:43 am

1 stop4h 44m

London

Wed 5/13

5:10 am-12:01 pm

2 stops6h 51m

$568

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 5/6

9:45 am-5:33 pm

2 stops7h 48m

London

Wed 5/13

9:30 am-3:29 pm

1 stop5h 59m

$571

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Fri 5/1

6:59 am-11:43 am

1 stop4h 44m

London

Sat 5/9

12:20 pm-6:13 pm

1 stop5h 53m

$661
Quickest round-trip

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Sat 5/2

6:59 am-11:43 am

1 stop4h 44m

London

Sat 5/9

6:10 pm-10:28 pm

1 stop4h 18m

$661

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Sat 5/2

4:05 pm-9:38 pm

1 stop5h 33m

London

Sat 5/9

9:30 am-3:29 pm

1 stop5h 59m

$661

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Mon 5/4

4:05 pm-9:38 pm

1 stop5h 33m

London

Mon 5/11

9:30 am-3:29 pm

1 stop5h 59m

$661

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 6/4

9:55 am-2:58 pm

1 stop5h 03m

London

Mon 6/8

3:30 pm-8:29 pm

1 stop4h 59m

$661

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 5/1

4:05 pm-9:38 pm

1 stop5h 33m

London

Sat 5/9

9:30 am-3:29 pm

1 stop5h 59m

$661

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Thu 4/30

6:00 am-5:04 pm

2 stops11h 04m

London

Sat 5/2

12:20 pm-6:13 pm

1 stop5h 53m

$670

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 4/29

9:00 am-5:04 pm

1 stop8h 04m

London

Sat 5/2

9:30 am-3:29 pm

1 stop5h 59m

$686

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/21

Showing 1-10 of 31 resultsSorted by cheapest first
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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, September is the cheapest month in which you can book a flight from Washington, D.C. to London, Ontario (average of $105). Flying from Washington, D.C. to London, Ontario in March is currently the most expensive (average of $211). 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 4h 44m. Air Canada provides one of the quickest options available for as low as $568. 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 Washington, D.C. Dulles Intl - London or Baltimore/Washington - 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, September is the cheapest month in which you can book a flight from Washington, D.C. to London, Ontario (average of $105). Flying from Washington, D.C. to London, Ontario in March is currently the most expensive (average of $211). 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

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