HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
London

$106+ Cheap flights from Washington to London, ON (YXU)

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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YXU
Mar 17 — Mar 241
Tue 3/17
Tue 3/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to London with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Washington to London

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 February 15, 2026.

This Air Canada deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/58:00 pm
SEA
-
YXU
2 stops9h 46m
Air Canada
Sun 3/85:40 pm
YXU
-
SEA
1 stop7h 36m
Air Canada
Deal found 2/14$312
This Air Canada deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/315:40 am
SEA
-
YXU
2 stops12h 38m
Air Canada
Tue 4/79:25 am
YXU
-
SEA
1 stop15h 28m
Air Canada
Deal found 2/14$356
This Air Canada deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/298:00 am
SEA
-
YXU
1 stop10h 18m
Air Canada
Sun 4/59:25 am
YXU
-
SEA
1 stop15h 28m
Air Canada
Deal found 2/12$357
This United Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/117:00 am
SEA
-
YXU
2 stops11h 21m
United Airlines
Wed 3/185:40 pm
YXU
-
SEA
1 stop7h 36m
United Airlines
Deal found 2/11$402
This United Airlines deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/111:35 pm
SEA
-
YXU
2 stops14h 28m
United Airlines
Wed 4/85:10 am
YXU
-
SEA
2 stops20h 46m
United Airlines
Deal found 2/14$418

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 February 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$312
(Air Canada)

One-way from

$106
(Trip.com)
Provider with most accurate pricing for Seattle/Tacoma Intl-London flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-London flights.
Search Deals
From Washington to London
Search Deals
One-way flight from 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 2,558,603 searches. Data last updated February 15, 2026.
Use the filters below to find and compare flights from Washington to London that are best for you.

Fly from

Washington

Fly to

London

Route

Depart

Return

Price

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 3/5

8:00 pm-8:46 am

2 stops9h 46m

London

Sun 3/8

5:40 pm-10:16 pm

1 stop7h 36m

$312

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 3/29

5:50 am-9:18 pm

2 stops12h 28m

London

Sun 4/5

5:10 am-3:05 pm

2 stops12h 55m

$337

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 5/10

7:35 pm-5:20 am

1 stop6h 45m

$106

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 5/9

11:14 pm-9:38 pm

2 stops19h 24m

$184

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 5/10

10:49 pm-9:38 pm

2 stops19h 49m

$184

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 5/10

9:50 am-5:20 am

3 stops16h 30m

$276

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/14

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

What is the cheapest month to book a flight from State of Washington to London, Ontario?

Currently, March is the cheapest month in which you can book a flight from State of Washington to London, Ontario (average of $123). Flying from State of Washington to London, Ontario in December is currently the most expensive (average of $281). 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 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?

    Located just 5.3 mi from the city center, London (YXU) is the airport most travelers will use when flying to London from Washington.

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

    Air Canada can get you from State of Washington to London, Ontario in just under 9h 46m. Your travel time can differ by up to . The distance from State of Washington to London, Ontario is about 2000 mi.

  • 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.

  • What is the cheapest month to book a flight from State of Washington to London, Ontario?

    Currently, March is the cheapest month in which you can book a flight from State of Washington to London, Ontario (average of $123). Flying from State of Washington to London, Ontario in December is currently the most expensive (average of $281). 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

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
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 Pearson Intl flights
Newark to Toronto Island flights
John F Kennedy Intl to Pearson Intl flights
John F Kennedy Intl to Pierre Elliott Trudeau Intl flights
LaGuardia to Pierre Elliott Trudeau Intl flights
Newark to Pierre Elliott Trudeau Intl flights
LaGuardia to Pearson Intl flights
Dulles Intl to Pearson Intl flights
O'Hare Intl to Pearson Intl flights
Los Angeles to Pearson Intl flights
Reagan-National to Pearson Intl flights
Dallas/Fort Worth to Pearson Intl flights
Boston to Pearson Intl flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Reagan-National to Pierre Elliott Trudeau Intl flights
San Francisco to Pearson Intl flights
O'Hare Intl to Pierre Elliott Trudeau Intl flights
Los Angeles to Pierre Elliott Trudeau Intl flights
Seattle to Pearson Intl flights
Boston to Toronto Island flights
Boston to Pierre Elliott Trudeau Intl flights
Atlanta to Pearson Intl flights
Hobby to Pearson Intl flights
Minneapolis to Pierre Elliott Trudeau Intl flights
Sky Harbor Intl to Pearson Intl flights
Minneapolis to Pearson Intl flights
Denver to Pierre Elliott Trudeau Intl flights
Dallas/Fort Worth to Pierre Elliott Trudeau Intl flights
Baltimore to Pearson Intl flights
San Francisco to Pierre Elliott Trudeau Intl flights
Dulles Intl to Toronto Island flights
Miami to Pierre Elliott Trudeau Intl flights
Fort Lauderdale to Pierre Elliott Trudeau Intl flights
John F Kennedy Intl to Toronto Island flights
George Bush Intcntl to Pearson Intl flights
Atlanta to Pierre Elliott Trudeau Intl flights
Orlando to Pearson Intl flights
Philadelphia to Pearson Intl flights
Midway to Pearson Intl flights
Baltimore to Pierre Elliott Trudeau Intl flights
Orlando to Pierre Elliott Trudeau Intl flights
Midway to Toronto Island flights
Austin to Pearson Intl flights
San Diego to Pearson Intl flights
Fort Lauderdale to Pearson Intl flights
Miami to Pearson Intl flights
John F Kennedy Intl to Hamilton flights
LaGuardia to Toronto Island flights
O'Hare Intl to Toronto Island flights
Denver to Pearson Intl flights

Top airline flying from Washington to London

Discover the top airline that operate flights from Washington to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$460Average$857FlexibilityNo cancel feeOn-time67%

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.