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Cheap flights from London, ON to Washington, D.C. from C$ 372

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 23/5. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — WAS
11 May — 18 May1
1 adult
1 adult, Economy, 0 bags

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

Enter your travel dates to find the best prices.

Cheapest flights from London to Washington, D.C.
Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 April 2026.

Thu 15/105:40 a.m.
YXU
-
DCA
2 stops6h 20m
Air Canada
Sun 18/1012:40 p.m.
DCA
-
YXU
2 stops9h 00m
Air Canada
Deal found 8/4C$ 658
Thu 15/103:30 p.m.
YXU
-
IAD
1 stop4h 55m
Air Canada
Sun 18/109:55 a.m.
IAD
-
YXU
1 stop5h 00m
Air Canada
Deal found 8/4C$ 658
Fri 22/55:10 a.m.
YXU
-
DCA
2 stops6h 51m
Air Canada
Tue 26/56:59 a.m.
DCA
-
YXU
1 stop4h 44m
Air Canada
Deal found 7/4C$ 685
Thu 2/79:30 a.m.
YXU
-
IAD
1 stop5h 54m
Air Canada
Tue 14/79:55 a.m.
IAD
-
YXU
1 stop5h 00m
Air Canada
Deal found 6/4C$ 685
Sat 23/55:10 a.m.
YXU
-
IAD
2 stops9h 53m
Air Canada
Tue 26/54:05 p.m.
IAD
-
YXU
1 stop5h 33m
Air Canada
Deal found 7/4C$ 690
Sat 2/55:10 a.m.
YXU
-
DCA
1 stop3h 43m
Air Canada
Wed 6/512:45 p.m.
DCA
-
YXU
2 stops8h 53m
Air Canada
Deal found 9/4C$ 709
Sat 23/512:20 p.m.
YXU
-
IAD
2 stops6h 38m
Air Canada
Wed 27/54:05 p.m.
IAD
-
YXU
1 stop5h 33m
Air Canada
Deal found 9/4C$ 714
Sat 23/56:10 p.m.
YXU
-
DCA
1 stop4h 18m
Air Canada
Sat 30/56:59 a.m.
DCA
-
YXU
1 stop10h 34m
Air Canada
Deal found 8/4C$ 718
Sat 23/512:20 p.m.
YXU
-
IAD
1 stop8h 09m
Air Canada
Sat 30/59:55 a.m.
IAD
-
YXU
1 stop7h 38m
Air Canada
Deal found 8/4C$ 752
Sat 23/512:20 p.m.
YXU
-
DCA
1 stop5h 53m
United Airlines
Sat 30/59:30 a.m.
DCA
-
YXU
2 stops12h 08m
United Airlines
Deal found 8/4C$ 779
Thu 2/712:20 p.m.
YXU
-
BWI
2 stops9h 06m
United Airlines
Tue 14/76:15 a.m.
BWI
-
YXU
2 stops15h 25m
United Airlines
Deal found 6/4C$ 932
Thu 21/512:20 p.m.
YXU
-
BWI
2 stops12h 13m
United Airlines
Thu 28/56:10 a.m.
BWI
-
YXU
2 stops15h 28m
United Airlines
Deal found 6/4C$ 974

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

Discover tips and strategies to find the most affordable flight options for your journey from London (YXU) to Washington, D.C. (WAS). 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 11 April 2026.

Round-trip from

C$ 685

One-way from

C$ 372
Air Canada
  • Air Canada
  • 22/5-26/5
  • 3 total stops
  • 11h 35m total
  • London to Washington, D.C.
Search Deals
Air Canada
  • Air Canada
  • 21/5
  • 1 total stop
  • 5h 53m total
  • London to Washington, D.C.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to Washington, D.C. 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 629,999 searches. Data last updated 11 April 2026.
Use the filters below to find and compare flights from London to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Fri 22/5

6:10 p.m.-10:28 p.m.

1 stop4h 18m

Washington, D.C. Reagan-National

Tue 26/5

6:59 a.m.-11:43 a.m.

1 stop4h 44m

C$ 685

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 2/7

9:30 a.m.-3:24 p.m.

1 stop5h 54m

Washington, D.C. Dulles Intl

Tue 14/7

9:55 a.m.-2:55 p.m.

1 stop5h 00m

C$ 685

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Sat 2/5

12:20 p.m.-6:13 p.m.

1 stop5h 53m

Washington, D.C. Reagan-National

Wed 6/5

6:59 a.m.-11:43 a.m.

1 stop4h 44m

C$ 709

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sat 23/5

12:20 p.m.-6:58 p.m.

2 stops6h 38m

Washington, D.C. Dulles Intl

Wed 27/5

4:05 p.m.-9:38 p.m.

1 stop5h 33m

C$ 714

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Sat 23/5

6:10 p.m.-10:28 p.m.

1 stop4h 18m

Washington, D.C. Reagan-National

Sat 30/5

6:59 a.m.-5:33 p.m.

1 stop10h 34m

C$ 718

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sat 23/5

12:20 p.m.-8:29 p.m.

1 stop8h 09m

Washington, D.C. Dulles Intl

Tue 26/5

4:05 p.m.-9:38 p.m.

1 stop5h 33m

C$ 736

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sat 23/5

5:10 a.m.-11:20 a.m.

1 stop6h 10m

Washington, D.C. Dulles Intl

Sat 30/5

6:10 a.m.-9:38 p.m.

2 stops15h 28m

C$ 779

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sat 23/5

5:10 a.m.-11:20 a.m.

1 stop6h 10m

Washington, D.C. Dulles Intl

Tue 26/5

4:05 p.m.-9:38 p.m.

1 stop5h 33m

C$ 779

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Sat 23/5

5:10 a.m.-2:23 p.m.

2 stops9h 13m

Washington, D.C. Reagan-National

Sat 30/5

6:30 a.m.-9:38 p.m.

2 stops15h 08m

C$ 787

LondonBaltimore

YXU - BWI

YXUBWI

London

Thu 2/7

12:20 p.m.-9:26 p.m.

2 stops9h 06m

Baltimore/Washington

Tue 14/7

6:15 a.m.-9:40 p.m.

2 stops15h 25m

C$ 932

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/4

Showing 1-10 of 23 resultsSorted by cheapest first
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Best time to book a flight from London to Washington, D.C.

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

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

Currently, January is the cheapest month in which you can book a flight from London, Ontario to Washington, D.C. (average of C$ 108). Flying from London, Ontario to Washington, D.C. in April is currently the most expensive (average of C$ 256). 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 London to Washington, D.C.. 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 from for flights from London to Washington, D.C.?

    Most people fly from London (YXU) if they book a flight from London to Washington, D.C.. On average, London has 0 outbound flights to Washington, D.C. per day from 0 airlines. London is conveniently located just 8.6 km from London’s city centre.

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

    Air Canada and United Airlines can get you from London, Ontario to Washington, D.C. in just under 4h 18m. Your travel time can differ by up to 4h 48m. The distance from London, Ontario to Washington, D.C. is about 578 km. This flight may include one or multiple stops.

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

    When deciding which route to take from London, Ontario to Washington, D.C. consider London - Washington, D.C. Reagan-National, London - Washington, D.C. Dulles Intl or London - Baltimore/Washington as they are the most popular.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from London, Ontario to Washington, D.C. (average of C$ 108). Flying from London, Ontario to Washington, D.C. in April is currently the most expensive (average of C$ 256). 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

Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Silver Spring
Hanover
Fairfax
Reston
Ellicott City
Oxon Hill
Gaithersburg
Arlington
Herndon
Manassas
Fredericksburg
Alexandria
Rockville

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Can Cheapflights notify me if prices for flights from London to Washington, D.C. become cheaper?

Not ready to book yet? You can track prices for flights from London to Washington, D.C. on Cheapflights with our Price Alert feature and get notified when better prices are available.

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