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Cheap flights from London, ON to Washington, D.C. from C$ 399

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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — WAS
26 Dec — 2 Jan1
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 26 November 2025.

Tue 2/129:25 a.m.YXU - IAD
1 stop6h 21mUnited Airlines
Tue 9/128:20 a.m.IAD - YXU
2 stops13h 01mUnited Airlines
Deal found 25/11C$ 1,006
Tue 2/129:25 a.m.YXU - BWI
2 stops11h 43mUnited Airlines
Tue 9/1210:20 a.m.BWI - YXU
2 stops22h 26mUnited Airlines
Deal found 25/11C$ 1,023
Tue 2/128:10 p.m.YXU - IAD
3 stops22h 02mWestJet
Tue 9/126:03 a.m.IAD - YXU
3 stops24h 31mWestJet
Deal found 25/11C$ 1,683
Tue 2/128:10 p.m.YXU - IAD
2 stops21h 04mMultiple Airlines
Tue 9/126:03 a.m.IAD - YXU
3 stops24h 31mMultiple Airlines
Deal found 25/11C$ 1,862

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 26 November 2025.

Round-trip from

C$ 584

One-way from

C$ 399
Air Canada
  • Air Canada
  • 22/1-24/1
  • 3 total stops
  • 15h 11m total
  • London to Washington, D.C.
Search Deals
United Airlines
  • United Airlines
  • 9/1
  • 1 total stop
  • 4h 55m 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 26 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

Thu 22/1

5:10 a.m.-3:33 p.m.

2 stops10h 23m

Washington, D.C. Reagan-National

Sat 24/1

11:05 a.m.-9:21 p.m.

2 stops10h 16m

C$ 584

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Thu 22/1

9:25 a.m.-8:54 p.m.

2 stops11h 29m

Washington, D.C. Dulles Intl

Mon 26/1

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

2 stops7h 20m

C$ 584

LondonBaltimore

YXU - BWI

YXUBWI

London

Tue 20/1

5:10 a.m.-9:21 p.m.

2 stops16h 11m

Baltimore/Washington

Thu 22/1

10:05 a.m.-9:21 p.m.

2 stops11h 16m

C$ 804

LondonBaltimore

YXU - BWI

YXUBWI

London

Sat 10/1

5:10 a.m.-2:11 p.m.

2 stops9h 01m

Baltimore/Washington

Sat 17/1

10:05 a.m.-9:21 p.m.

2 stops11h 16m

C$ 804

LondonBaltimore

YXU - BWI

YXUBWI

London

Fri 9/1

5:10 a.m.-2:11 p.m.

2 stops9h 01m

Baltimore/Washington

Fri 16/1

10:05 a.m.-9:21 p.m.

2 stops11h 16m

C$ 1,235

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

Fri 9/1

5:40 p.m.-10:35 p.m.

1 stop4h 55m

C$ 399

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

Fri 9/1

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

1 stop3h 45m

C$ 399

LondonBaltimore

YXU - BWI

YXUBWI

London

Fri 9/1

9:25 a.m.-9:21 p.m.

2 stops11h 56m

C$ 484

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/11

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$ 185). Flying from London, Ontario to Washington, D.C. in January is currently the most expensive (average of C$ 278). 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 23m. Your travel time can differ by up to 5h 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 - Baltimore/Washington, London - Washington, D.C. Dulles Intl 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$ 185). Flying from London, Ontario to Washington, D.C. in January is currently the most expensive (average of C$ 278). 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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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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