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Cheap flights from London, ON to Washington, D.C. from C$ 341

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 29/9. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — WAS
23 ago. — 30 ago.1
1 adult

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 18 agosto 2025.

Round-trip from

C$ 854

One-way from

C$ 341
Air Canada
  • Air Canada
  • 12/9-16/9
  • 2 total stops
  • 9h 22m total
  • London to Washington, D.C.
Search Deals
29/9
  • 29/9
  • 2 total stops
  • 23h 55m total
  • London to Washington, D.C.
Search Deals

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

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 18 agosto 2025.

vie. 12/910:00 a.m.YXU - IAD
1 stop4h 25mMultiple Airlines
mar. 16/910:20 a.m.IAD - YXU
1 stop4h 57mMultiple Airlines
Deal found 18/8C$ 854
vie. 12/96:10 a.m.YXU - IAD
2 stops14h 57mUnited Airlines
mar. 16/910:14 p.m.IAD - YXU
2 stops17h 03mUnited Airlines
Deal found 18/8C$ 992
sáb. 27/96:10 a.m.YXU - BWI
2 stops7h 58mUnited Airlines
sáb. 27/95:20 p.m.BWI - YXU
2 stops15h 59mUnited Airlines
Deal found 17/8C$ 1,061
vie. 12/910:00 a.m.YXU - BWI
2 stops7h 29mUnited Airlines
mar. 16/96:15 a.m.BWI - YXU
2 stops9h 02mUnited Airlines
Deal found 18/8C$ 1,071
vie. 12/96:10 a.m.YXU - DCA
2 stops10h 12mMultiple Airlines
mar. 16/911:00 a.m.DCA - YXU
1 stop4h 17mMultiple Airlines
Deal found 18/8C$ 1,100
vie. 12/910:00 a.m.YXU - DCA
2 stops8h 03mUnited Airlines
mar. 16/96:00 a.m.DCA - YXU
2 stops9h 17mUnited Airlines
Deal found 18/8C$ 1,180

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 18 agosto 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

vie. 12/9

10:00 a.m.-2:25 p.m.

1 stop4h 25m

Washington, D.C. Dulles Intl

mar. 16/9

10:20 a.m.-3:17 p.m.

1 stop4h 57m

C$ 854

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

vie. 12/9

3:50 p.m.-7:44 p.m.

1 stop3h 54m

Washington, D.C. Reagan-National

mar. 16/9

11:00 a.m.-3:17 p.m.

1 stop4h 17m

C$ 876

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

vie. 12/9

6:10 a.m.-9:07 p.m.

2 stops14h 57m

Washington, D.C. Dulles Intl

mar. 16/9

10:14 p.m.-3:17 p.m.

2 stops17h 03m

C$ 992

LondonBaltimore

YXU - BWI

YXUBWI

London

sáb. 27/9

6:10 a.m.-2:08 p.m.

2 stops7h 58m

Baltimore/Washington

sáb. 27/9

5:20 p.m.-9:19 a.m.

2 stops15h 59m

C$ 1,061

LondonBaltimore

YXU - BWI

YXUBWI

London

vie. 12/9

10:00 a.m.-5:29 p.m.

2 stops7h 29m

Baltimore/Washington

mar. 16/9

6:15 a.m.-3:17 p.m.

2 stops9h 02m

C$ 1,071

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

vie. 12/9

6:10 a.m.-4:22 p.m.

2 stops10h 12m

Washington, D.C. Reagan-National

mar. 16/9

11:00 a.m.-3:17 p.m.

1 stop4h 17m

C$ 1,100

LondonWashington, D.C.

YXU - DCA

YXUDCA

London

vie. 12/9

10:00 a.m.-6:03 p.m.

2 stops8h 03m

Washington, D.C. Reagan-National

mar. 16/9

6:00 a.m.-3:17 p.m.

2 stops9h 17m

C$ 1,180

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

lun. 29/9

8:00 p.m.-7:55 p.m.

2 stops23h 55m

C$ 341

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

lun. 15/9

8:00 p.m.-3:06 p.m.

3 stops43h 06m

C$ 461

LondonWashington, D.C.

YXU - IAD

YXUIAD

London

lun. 29/9

10:00 a.m.-1:38 p.m.

1 stop3h 38m

C$ 474

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/8

Showing 1-10 of 16 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$ 256). Flying from London, Ontario to Washington, D.C. in October is currently the most expensive (average of C$ 352). 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 3h 54m. Your travel time can differ by up to 11h 03m. 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 - Baltimore/Washington or London - Washington, D.C. Dulles Intl 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$ 256). Flying from London, Ontario to Washington, D.C. in October is currently the most expensive (average of C$ 352). 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
Herndon
Hanover
Reston
Fairfax
Ellicott City
Oxon Hill
Gaithersburg
Arlington
Alexandria
Manassas
Fredericksburg
Rockville

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