Find flights
When to book
FAQs

Cheap flights from Washington to London, ON from C$ 352

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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YXU
25 Jun — 2 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to London

Enter your travel dates to find the best prices.

Cheapest flights from Washington to London
Explore the most affordable flight options available from Washington to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 May 2026.

Wed 23/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Wed 7/106:10 a.m.
YXU
-
SEA
1 stop15h 35m
WestJet
Deal found 23/5C$ 619
Tue 8/97:35 p.m.
SEA
-
YXU
1 stop6h 45m
WestJet
Fri 11/95:55 p.m.
YXU
-
SEA
1 stop27h 50m
WestJet
Deal found 21/5C$ 656
Tue 22/95:40 a.m.
SEA
-
YXU
2 stops13h 00m
Air Canada
Wed 7/103:30 p.m.
YXU
-
SEA
1 stop8h 34m
Air Canada
Deal found 23/5C$ 769
Wed 23/97:20 p.m.
SEA
-
YXU
2 stops11h 00m
Air Canada
Wed 7/103:30 p.m.
YXU
-
SEA
1 stop8h 34m
Air Canada
Deal found 23/5C$ 788
Tue 8/97:20 p.m.
SEA
-
YXU
2 stops11h 00m
Air Canada
Fri 11/93:30 p.m.
YXU
-
SEA
2 stops10h 12m
Air Canada
Deal found 21/5C$ 797
Tue 14/78:00 a.m.
SEA
-
YXU
1 stop6h 45m
Air Canada
Fri 17/73:30 p.m.
YXU
-
SEA
1 stop8h 37m
Air Canada
Deal found 24/5C$ 815
Tue 7/73:00 p.m.
SEA
-
YXU
2 stops15h 20m
Air Canada
Tue 14/710:05 a.m.
YXU
-
SEA
2 stops11h 27m
Air Canada
Deal found 25/5C$ 855

Find flight deals from Washington to London

Keep the following information in mind while searching for Washington to London flight deals. Data was last updated 26 May 2026.

Round-trip from

C$ 619

One-way from

C$ 352
WestJet
  • WestJet
  • 23/9-7/10
  • 2 total stops
  • 22h 20m total
  • Washington to London
Search Deals
WestJet
  • WestJet
  • 9/6
  • 1 total stop
  • 6h 45m total
  • Washington to London
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to London 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 May 2026.
Use the filters below to find and compare flights from Washington to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 8/9

7:35 p.m.-5:20 a.m.

1 stop6h 45m

London

Fri 11/9

5:55 p.m.-6:45 p.m.

1 stop27h 50m

C$ 656

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 14/10

7:20 p.m.-9:20 a.m.

2 stops11h 00m

London

Wed 28/10

3:25 p.m.-8:54 p.m.

1 stop8h 29m

C$ 769

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 8/9

7:20 p.m.-9:20 a.m.

2 stops11h 00m

London

Fri 11/9

3:30 p.m.-10:42 p.m.

2 stops10h 12m

C$ 797

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 22/9

8:00 a.m.-9:40 p.m.

1 stop10h 40m

London

Wed 7/10

3:30 p.m.-9:04 p.m.

1 stop8h 34m

C$ 813
Quickest round-trip

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 14/7

8:00 a.m.-5:45 p.m.

1 stop6h 45m

London

Fri 17/7

3:30 p.m.-9:07 p.m.

1 stop8h 37m

C$ 815

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 7/7

3:00 p.m.-9:20 a.m.

2 stops15h 20m

London

Tue 14/7

10:05 a.m.-6:32 p.m.

2 stops11h 27m

C$ 855
Cheapest one-way
Quickest one-way

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 9/6

5:45 a.m.-9:38 p.m.

2 stops12h 53m

C$ 385

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 9/6

11:00 p.m.-2:58 p.m.

2 stops12h 58m

C$ 465

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/5

Sorted by cheapest first

Best time to book a flight from Washington to London

Have a flexible travel schedule? Discover the best time to fly to London from Washington 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 Washington to London
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Washington to London. 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 into for flights to London from Washington?

    For a flight from Washington to London, you will be flying into London. London (YXU) is just 8.6 km from the centre of the city.

  • How long is the flight from State of Washington to London, Ontario?

    There are many flights that can get you from State of Washington to London, Ontario in 6h 45m. Fly via WestJet or Air Canada to get the fastest option. The distance between State of Washington and London, Ontario is about 3219 km. This flight may include one or multiple stops.

  • Can I find deals for flights from Washington to London that include hotel bookings?

    Yes. In addition to deals on Washington to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to London.

  • Can I find deals for business class flights from Washington to London?

    Yes. Cheapflights offers flight deals from Washington to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Port Stanley
Grand Bend

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to London

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Toronto Island flights
Newark to Pearson Intl flights
LaGuardia to Pearson Intl flights
John F Kennedy Intl to Pearson Intl flights
Newark to Pierre Elliott Trudeau Intl flights
LaGuardia to Pierre Elliott Trudeau Intl flights
Los Angeles to Pearson Intl flights
Reagan-National to Pearson Intl flights
Dulles Intl to Pearson Intl flights
San Francisco to Pearson Intl flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Boston to Pearson Intl flights
Dallas/Fort Worth to Pearson Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Pearson Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
Atlanta to Pearson Intl flights
Orlando to Pearson Intl flights
Seattle to Pearson Intl flights
Dulles Intl to Toronto Island flights
Hobby to Pearson Intl flights
Fort Lauderdale to Pearson Intl flights
Boston to Toronto Island flights
Boston to Pierre Elliott Trudeau Intl flights
San Francisco to Pierre Elliott Trudeau Intl flights
Baltimore to Pearson Intl flights
LaGuardia to Toronto Island flights
George Bush Intcntl to Pearson Intl flights
Baltimore to Pierre Elliott Trudeau Intl flights
Philadelphia to Pearson Intl flights
Newark to Hamilton flights
Dallas/Fort Worth to Pierre Elliott Trudeau Intl flights
O'Hare Intl to Toronto Island flights
San Diego to Pearson Intl flights
Raleigh to Pearson Intl flights
Miami to Pierre Elliott Trudeau Intl flights
Midway to Pearson Intl flights
Midway to Toronto Island flights
Philadelphia to Pierre Elliott Trudeau Intl flights
Ontario to Pearson Intl flights
Minneapolis to Pierre Elliott Trudeau Intl flights
Tampa to Pearson Intl flights
Denver to Pearson Intl flights
John F Kennedy Intl to Toronto Island flights
Charlotte to Pearson Intl flights
Austin to Pearson Intl flights
Atlanta to Pierre Elliott Trudeau Intl flights
Raleigh to Pierre Elliott Trudeau Intl flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Washington to London?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from Washington today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Washington to London?

Millions of users choose and trust Cheapflights to book the best flight deals from Washington to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Washington to London with no change fees?

Need flexible booking options for your flight to London from Washington? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Washington to London become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.