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$438+ 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YXU
Jul 10 — Jul 171
Fri 7/10
Fri 7/17
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 June 10, 2026.

This Air Canada deal was found by Cheapflights users on 6/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1811:00 am
DCA
-
YXU
1 stop3h 55m
Air Canada
Wed 9/233:30 pm
YXU
-
DCA
1 stop4h 30m
Air Canada
Deal found 6/9$705
This Air Canada deal was found by Cheapflights users on 6/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/94:00 pm
IAD
-
YXU
1 stop5h 40m
Air Canada
Mon 10/1210:05 am
YXU
-
IAD
1 stop5h 20m
Air Canada
Deal found 6/9$705
This Air Canada deal was found by Cheapflights users on 6/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1811:00 am
DCA
-
YXU
1 stop3h 55m
Air Canada
Tue 9/225:40 am
YXU
-
DCA
2 stops6h 20m
Air Canada
Deal found 6/9$710
This United Airlines deal was found by Cheapflights users on 6/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:55 am
IAD
-
YXU
1 stop5h 00m
United Airlines
Mon 9/73:30 pm
YXU
-
IAD
2 stops7h 29m
United Airlines
Deal found 6/8$721
This United Airlines deal was found by Cheapflights users on 6/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/910:40 pm
IAD
-
YXU
2 stops16h 15m
United Airlines
Mon 10/1210:05 am
YXU
-
IAD
2 stops12h 54m
United Airlines
Deal found 6/8$731
This Air Canada deal was found by Cheapflights users on 6/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/49:55 am
IAD
-
YXU
1 stop4h 57m
Air Canada
Fri 7/1010:05 am
YXU
-
IAD
1 stop5h 19m
Air Canada
Deal found 6/9$740
This Air Canada deal was found by Cheapflights users on 6/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/46:59 am
DCA
-
YXU
1 stop10h 43m
Air Canada
Fri 7/103:30 pm
YXU
-
DCA
1 stop4h 27m
Air Canada
Deal found 6/9$764
This United Airlines deal was found by Cheapflights users on 6/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:15 am
IAD
-
YXU
2 stops8h 40m
United Airlines
Wed 9/233:30 pm
YXU
-
IAD
1 stop5h 54m
United Airlines
Deal found 6/9$822
This United Airlines deal was found by Cheapflights users on 6/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1811:00 am
DCA
-
YXU
1 stop3h 55m
United Airlines
Wed 9/235:40 am
YXU
-
DCA
2 stops11h 28m
United Airlines
Deal found 6/9$828
This United Airlines deal was found by Cheapflights users on 6/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/188:30 am
BWI
-
YXU
2 stops13h 10m
United Airlines
Mon 9/213:30 pm
YXU
-
BWI
2 stops19h 09m
United Airlines
Deal found 6/8$832
This Air Canada deal was found by Cheapflights users on 6/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/111:00 am
DCA
-
YXU
1 stop3h 55m
Air Canada
Tue 7/73:30 pm
YXU
-
DCA
1 stop4h 27m
Air Canada
Deal found 6/6$844
This Air Canada deal was found by Cheapflights users on 6/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/34:20 pm
IAD
-
YXU
1 stop5h 20m
Air Canada
Tue 7/73:30 pm
YXU
-
IAD
1 stop4h 54m
Air Canada
Deal found 6/6$844

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 June 10, 2026.

Round-trip from

$705
(United Airlines)

One-way from

$438
(United Airlines)
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 June 10, 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
Quickest round-trip

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Fri 9/4

11:00 am-2:55 pm

1 stop3h 55m

London

Mon 9/7

3:30 pm-7:57 pm

1 stop4h 27m

$705

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Fri 9/18

11:00 am-2:55 pm

1 stop3h 55m

London

Tue 9/22

3:30 pm-8:00 pm

1 stop4h 30m

$705

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Fri 9/18

11:00 am-2:55 pm

1 stop3h 55m

London

Wed 9/23

3:30 pm-8:00 pm

1 stop4h 30m

$705

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 9/4

9:55 am-2:55 pm

1 stop5h 00m

London

Mon 9/7

10:05 am-3:24 pm

1 stop5h 19m

$705

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 10/9

10:40 pm-2:55 pm

2 stops16h 15m

London

Mon 10/12

10:05 am-10:59 pm

2 stops12h 54m

$731

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 10/9

4:00 pm-9:40 pm

1 stop5h 40m

London

Mon 10/12

3:30 pm-8:25 pm

1 stop4h 55m

$811

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 9/18

6:15 am-2:55 pm

2 stops8h 40m

London

Wed 9/23

3:30 pm-9:24 pm

1 stop5h 54m

$822

BaltimoreLondon

BWI - YXU

BWIYXU

Baltimore/Washington

Fri 9/18

8:30 am-9:40 pm

2 stops13h 10m

London

Mon 9/21

3:30 pm-10:39 am

2 stops19h 09m

$832

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 7/3

9:55 am-2:55 pm

1 stop5h 00m

London

Fri 7/10

10:05 am-3:24 pm

1 stop5h 19m

$844

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 7/3

4:20 pm-9:40 pm

1 stop5h 20m

London

Tue 7/7

3:30 pm-8:24 pm

1 stop4h 54m

$844

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/6

Showing 1-10 of 18 resultsSorted by cheapest first
1
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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
No data available for this route at this time. Please check back soon.

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 3h 55m. United Airlines provides one of the quickest options available for as low as $705. Washington, D.C. and London, Ontario are separated by a distance of 359 mi.

  • 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.

See more FAQs

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