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Cheap flights from London, ON to Washington, D.C. from C$ 308

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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — WAS
27 Jan — 3 Feb1
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 28 December 2025.

Wed 31/129:25 a.m.YXU - IAD
1 stop6h 21mUnited Airlines
Fri 2/18:15 a.m.IAD - YXU
2 stops13h 06mUnited Airlines
Deal found 27/12C$ 1,525

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 28 December 2025.

Round-trip from

C$ 559

One-way from

C$ 308
Air Canada
  • Air Canada
  • 10/1-17/1
  • 3 total stops
  • 14h 00m total
  • London to Washington, D.C.
Search Deals
10/2
  • 10/2
  • 3 total stops
  • 44h 33m 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 28 December 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 - IAD

YXUIAD

London

Sat 10/1

9:50 a.m.-3:46 p.m.

1 stop5h 56m

Washington, D.C. Dulles Intl

Sat 17/1

9:45 a.m.-5:05 p.m.

2 stops7h 20m

C$ 559

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Sat 10/1

5:10 a.m.-3:31 p.m.

2 stops10h 21m

Washington, D.C. Reagan-National

Sat 17/1

11:05 a.m.-9:20 p.m.

2 stops10h 15m

C$ 560

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

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

2 stops8h 23m

C$ 589

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Mon 30/3

9:25 a.m.-3:34 p.m.

1 stop6h 09m

Washington, D.C. Dulles Intl

Tue 31/3

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

1 stop4h 48m

C$ 589

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Wed 14/1

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

1 stop3h 45m

Washington, D.C. Reagan-National

Thu 15/1

7:30 a.m.-5:05 p.m.

2 stops9h 35m

C$ 674

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Wed 14/1

5:40 p.m.-9:25 p.m.

1 stop3h 45m

Washington, D.C. Dulles Intl

Thu 15/1

6:00 a.m.-5:05 p.m.

2 stops11h 05m

C$ 674

LondonBaltimore

YXU - BWI

YXUBWI

London

Fri 20/2

9:25 a.m.-9:17 p.m.

2 stops11h 52m

Baltimore/Washington

Mon 23/2

6:30 a.m.-9:21 p.m.

2 stops14h 51m

C$ 801

LondonBaltimore

YXU - BWI

YXUBWI

London

Sat 10/1

5:05 p.m.-3:14 p.m.

1 stop22h 09m

Baltimore/Washington

Sat 17/1

5:30 a.m.-6:34 a.m.

2 stops49h 04m

C$ 1,561

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Tue 10/2

8:10 p.m.-4:43 p.m.

3 stops44h 33m

C$ 308

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Tue 10/2

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

1 stop3h 45m

C$ 323

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/12

Showing 1-10 of 15 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$ 180). Flying from London, Ontario to Washington, D.C. in January is currently the most expensive (average of C$ 271). 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 56m. Your travel time can differ by up to 5h 56m. 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. Dulles Intl, London - Baltimore/Washington or London - Washington, D.C. Reagan-National 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$ 180). Flying from London, Ontario to Washington, D.C. in January is currently the most expensive (average of C$ 271). 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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