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$271+ 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 5/24. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — YXU
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
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 February 4, 2026.

This Air Canada deal was found by Cheapflights users on 2/3. 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 3/204:30 pm
IAD
-
YXU
1 stop4h 51m
Air Canada
Fri 3/279:40 am
YXU
-
IAD
1 stop6h 06m
Air Canada
Deal found 2/3$586
This Air Canada deal was found by Cheapflights users on 2/3. 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 3/209:40 am
DCA
-
YXU
1 stop7h 25m
Air Canada
Fri 3/275:10 am
YXU
-
DCA
1 stop3h 45m
Air Canada
Deal found 2/3$611
This Air Canada deal was found by Cheapflights users on 2/3. 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 3/216:59 am
DCA
-
YXU
1 stop10h 06m
Air Canada
Sat 3/285:10 am
YXU
-
DCA
2 stops10h 21m
Air Canada
Deal found 2/3$620
This Air Canada deal was found by Cheapflights users on 2/3. 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 2/254:30 pm
IAD
-
YXU
1 stop4h 51m
Air Canada
Thu 2/269:25 am
YXU
-
IAD
1 stop6h 24m
Air Canada
Deal found 2/3$653
This Air Canada deal was found by Cheapflights users on 2/2. 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 3/194:30 pm
IAD
-
YXU
1 stop4h 51m
Air Canada
Thu 3/269:40 am
YXU
-
IAD
1 stop6h 06m
Air Canada
Deal found 2/2$655
This Mytrip deal was found by Cheapflights users on 2/2. 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 4/235:45 am
BWI
-
YXU
2 stops24h 50m
Multiple Airlines
Tue 4/285:55 pm
YXU
-
BWI
3 stops23h 08m
Multiple Airlines
Deal found 2/2$657
This Air Canada deal was found by Cheapflights users on 2/2. 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.
Mon 2/2312:55 pm
DCA
-
YXU
2 stops8h 26m
Air Canada
Tue 2/245:10 am
YXU
-
DCA
1 stop3h 45m
Air Canada
Deal found 2/2$658
This Air Canada deal was found by Cheapflights users on 2/2. 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 3/1912:55 pm
DCA
-
YXU
2 stops8h 26m
Air Canada
Thu 3/265:40 pm
YXU
-
DCA
1 stop4h 55m
Air Canada
Deal found 2/2$660
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/206:00 am
DCA
-
YXU
2 stops11h 05m
United Airlines
Fri 3/275:40 pm
YXU
-
DCA
1 stop4h 55m
United Airlines
Deal found 2/3$682
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/206:00 am
IAD
-
YXU
2 stops11h 05m
United Airlines
Fri 3/275:10 am
YXU
-
IAD
1 stop6h 36m
United Airlines
Deal found 2/3$682
This United Airlines deal was found by Cheapflights users on 2/2. 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 3/196:00 am
IAD
-
YXU
2 stops11h 05m
United Airlines
Thu 3/265:10 am
YXU
-
IAD
1 stop6h 36m
United Airlines
Deal found 2/2$751
This United Airlines deal was found by Cheapflights users on 2/2. 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 4/236:00 am
BWI
-
YXU
2 stops15h 18m
United Airlines
Tue 4/289:25 am
YXU
-
BWI
2 stops11h 58m
United Airlines
Deal found 2/2$827

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 February 4, 2026.

Round-trip from

$586
(Air Canada)

One-way from

$271
(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 February 4, 2026.
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 - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 3/20

4:30 pm-9:21 pm

1 stop4h 51m

London

Fri 3/27

9:40 am-3:46 pm

1 stop6h 06m

$586

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Fri 3/20

9:40 am-5:05 pm

1 stop7h 25m

London

Fri 3/27

5:10 am-8:55 am

1 stop3h 45m

$611

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Sat 3/21

6:50 pm-8:46 am

1 stop13h 56m

London

Sat 3/28

5:10 am-8:55 am

1 stop3h 45m

$611

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Wed 2/25

4:30 pm-9:21 pm

1 stop4h 51m

London

Thu 2/26

9:25 am-3:49 pm

1 stop6h 24m

$653

BaltimoreLondon

BWI - YXU

BWIYXU

Baltimore/Washington

Thu 4/23

5:45 am-6:35 am

2 stops24h 50m

London

Tue 4/28

5:55 pm-5:03 pm

3 stops23h 08m

$657

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Mon 2/23

12:55 pm-9:21 pm

2 stops8h 26m

London

Tue 2/24

5:10 am-8:55 am

1 stop3h 45m

$658

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Thu 3/19

12:55 pm-9:21 pm

2 stops8h 26m

London

Thu 3/26

5:40 pm-10:35 pm

1 stop4h 55m

$660

Washington, D.C.London

DCA - YXU

DCAYXU

Washington, D.C. Reagan-National

Fri 3/20

6:00 am-5:05 pm

2 stops11h 05m

London

Fri 3/27

5:40 pm-10:35 pm

1 stop4h 55m

$682

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Fri 3/20

6:00 am-5:05 pm

2 stops11h 05m

London

Fri 3/27

5:10 am-11:46 am

1 stop6h 36m

$682

Washington, D.C.London

IAD - YXU

IADYXU

Washington, D.C. Dulles Intl

Thu 3/19

9:55 am-5:05 pm

2 stops7h 10m

London

Thu 3/26

9:40 am-4:11 pm

2 stops6h 31m

$740

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

Showing 1-10 of 30 results
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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, 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 4h 51m. 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 341 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 Baltimore/Washington - London. You may also consider Washington, D.C. Reagan-National - 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.

See more FAQs

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