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Cheap flights from London, ON to Washington, D.C. from C$ 631

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 21/12. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — WAS
6 Dec — 13 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 6 November 2025.

Sat 20/129:25 a.m.YXU - IAD
2 stops14h 50mUnited Airlines
Sat 27/128:15 a.m.IAD - YXU
2 stops13h 06mUnited Airlines
Deal found 5/11C$ 1,054
Sat 20/129:25 a.m.YXU - DCA
2 stops11h 34mUnited Airlines
Sat 27/127:30 a.m.DCA - YXU
2 stops13h 51mUnited Airlines
Deal found 5/11C$ 1,123
Sat 20/129:25 a.m.YXU - BWI
2 stops7h 33mUnited Airlines
Sat 27/126:15 a.m.BWI - YXU
2 stops15h 06mUnited Airlines
Deal found 5/11C$ 1,418

Cheap 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 6 November 2025.

Round-trip from

C$ 655

One-way from

C$ 631
Air Canada
  • Air Canada
  • 24/4-27/4
  • 4 total stops
  • 18h 37m total
  • London to Washington, D.C.
Search Deals
Air Canada
  • Air Canada
  • 21/12
  • 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 6 November 2025.
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 - DCA

YXUDCA

London

Fri 24/4

5:10 a.m.-3:24 p.m.

2 stops10h 14m

Washington, D.C. Reagan-National

Mon 27/4

12:55 p.m.-9:18 p.m.

2 stops8h 23m

C$ 655

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 24/4

9:25 a.m.-3:39 p.m.

1 stop6h 14m

Washington, D.C. Dulles Intl

Tue 28/4

9:55 a.m.-9:18 p.m.

2 stops11h 23m

C$ 655

LondonBaltimore

YXU - BWI

YXUBWI

London

Tue 28/4

9:25 a.m.-8:57 p.m.

2 stops11h 32m

Baltimore/Washington

Thu 30/4

10:45 a.m.-9:18 p.m.

2 stops10h 33m

C$ 900

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sat 20/12

9:25 a.m.-12:15 a.m.

2 stops14h 50m

Washington, D.C. Dulles Intl

Sat 27/12

8:15 a.m.-9:21 p.m.

2 stops13h 06m

C$ 1,054

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Sat 20/12

9:25 a.m.-8:59 p.m.

2 stops11h 34m

Washington, D.C. Reagan-National

Sat 27/12

7:30 a.m.-9:21 p.m.

2 stops13h 51m

C$ 1,123

LondonBaltimore

YXU - BWI

YXUBWI

London

Sat 20/12

9:25 a.m.-4:58 p.m.

2 stops7h 33m

Baltimore/Washington

Sat 27/12

6:15 a.m.-9:21 p.m.

2 stops15h 06m

C$ 1,418

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Sun 21/12

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

1 stop3h 45m

C$ 631

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sun 21/12

9:25 a.m.-3:46 p.m.

1 stop6h 21m

C$ 700

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Sun 21/12

8:10 p.m.-11:38 a.m.

3 stops39h 28m

C$ 773

LondonBaltimore

YXU - BWI

YXUBWI

London

Sun 21/12

8:10 p.m.-9:27 a.m.

2 stops37h 17m

C$ 782

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

Showing 1-10 of 12 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, February is the cheapest month in which you can book a flight from London, Ontario to Washington, D.C. (average of C$ 186). Flying from London, Ontario to Washington, D.C. in January is currently the most expensive (average of C$ 276). 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 10h 14m. Your travel time can differ by up to 1h 18m. 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, February is the cheapest month in which you can book a flight from London, Ontario to Washington, D.C. (average of C$ 186). Flying from London, Ontario to Washington, D.C. in January is currently the most expensive (average of C$ 276). 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
Hanover
Fairfax
Reston
Ellicott City
Oxon Hill
Gaithersburg
Herndon
Arlington
Manassas
Fredericksburg
Alexandria
Rockville

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How does Cheapflights help users find flights from London to Washington, D.C.?

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Why should you use Cheapflights to find cheap flight tickets from London to Washington, D.C.?

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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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