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Cheap flights from London, ON to Washington, D.C. from C$ 331

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 27/3. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — WAS
12 Mar — 19 Mar1
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 10 February 2026.

Mon 30/39:40 a.m.
YXU
-
IAD
1 stop5h 54m
Air Canada
Tue 31/34:30 p.m.
IAD
-
YXU
1 stop4h 48m
Air Canada
Deal found 8/2C$ 599
Mon 30/35:10 a.m.
YXU
-
DCA
1 stop3h 43m
Air Canada
Tue 31/36:00 a.m.
DCA
-
YXU
2 stops11h 03m
Air Canada
Deal found 8/2C$ 603
Wed 25/39:40 a.m.
YXU
-
IAD
1 stop6h 06m
Air Canada
Wed 1/44:30 p.m.
IAD
-
YXU
1 stop4h 48m
Air Canada
Deal found 8/2C$ 641
Mon 2/35:10 a.m.
YXU
-
BWI
2 stops16h 07m
United Airlines
Wed 4/310:30 a.m.
BWI
-
YXU
2 stops10h 51m
United Airlines
Deal found 8/2C$ 926

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 10 February 2026.

Round-trip from

C$ 599

One-way from

C$ 331
Air Canada
  • Air Canada
  • 30/3-31/3
  • 2 total stops
  • 10h 42m total
  • London to Washington, D.C.
Search Deals
Air Canada
  • Air Canada
  • 27/3
  • 1 total stop
  • 3h 45m 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 10 February 2026.
Use the filters below to find and compare flights from London to Washington, D.C. that are best for you.

Fly from

London

Fly to

Washington, D.C.

Route

Depart

Return

Price

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Mon 30/3

9:40 a.m.-3:34 p.m.

1 stop5h 54m

Washington, D.C. Dulles Intl

Tue 31/3

4:30 p.m.-9:18 p.m.

1 stop4h 48m

C$ 599

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Mon 30/3

5:10 a.m.-12:01 p.m.

2 stops6h 51m

Washington, D.C. Reagan-National

Tue 31/3

11:05 a.m.-9:18 p.m.

2 stops10h 13m

C$ 603

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 25/3

9:40 a.m.-3:46 p.m.

1 stop6h 06m

Washington, D.C. Dulles Intl

Wed 1/4

4:30 p.m.-9:18 p.m.

1 stop4h 48m

C$ 641

LondonBaltimore

YXU - BWI

YXUBWI

London

Mon 2/3

5:10 a.m.-9:17 p.m.

2 stops16h 07m

Baltimore/Washington

Wed 4/3

10:30 a.m.-9:21 p.m.

2 stops10h 51m

C$ 926

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 27/3

9:40 a.m.-3:46 p.m.

1 stop6h 06m

C$ 331

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Fri 27/3

9:40 a.m.-5:33 p.m.

2 stops7h 53m

C$ 380

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 27/3

9:40 a.m.-9:05 p.m.

2 stops11h 25m

C$ 380

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Tue 24/3

5:10 a.m.-8:55 a.m.

1 stop3h 45m

C$ 393

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Wed 25/3

5:10 a.m.-8:55 a.m.

1 stop3h 45m

C$ 393

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 24/3

9:40 a.m.-3:46 p.m.

1 stop6h 06m

C$ 393

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/2

Showing 1-10 of 17 results
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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$ 106). Flying from London, Ontario to Washington, D.C. in August is currently the most expensive (average of C$ 246). 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 5h 54m. Your travel time can differ by up to 10h 13m. The distance from London, Ontario to Washington, D.C. is about 549 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$ 106). Flying from London, Ontario to Washington, D.C. in August is currently the most expensive (average of C$ 246). 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 find flights from London to Washington, D.C. with no change fees?

Yes! Cheapflights helps users easily find flights from London to Washington, D.C. with no change fees.

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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