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$405+ Cheap flights from Washington to London, ON (YXU)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YXU
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Washington to London

Keep the following information in mind while searching for Washington to London flight deals. Data was last updated September 16, 2025.

Round-trip from

$405
(Air Canada)
From Washington to London
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Find 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 September 16, 2025.

This Air Canada deal was found by Cheapflights users on 9/16. 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.
Fri 10/318:15 amSEA - YXU
1 stop10h 06mAir Canada
Fri 11/75:40 pmYXU - SEA
1 stop7h 36mAir Canada
Deal found 9/16$405
This Air Canada deal was found by Cheapflights users on 9/16. 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.
Mon 12/228:00 pmSEA - YXU
2 stops9h 46mAir Canada
Mon 12/295:40 pmYXU - SEA
1 stop7h 36mAir Canada
Deal found 9/16$605
This Mytrip deal was found by Cheapflights users on 9/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3110:55 pmSEA - YXU
3 stops42h 17mWestJet
Fri 11/78:10 pmYXU - SEA
2 stops17h 13mWestJet
Deal found 9/16$683
This Mytrip deal was found by Cheapflights users on 9/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3110:55 pmSEA - YXU
3 stops42h 17mMultiple Airlines
Fri 11/78:10 pmYXU - SEA
3 stops41h 13mMultiple Airlines
Deal found 9/16$695
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Mon 12/225:02 amSEA - YXU
2 stops13h 19mUnited Airlines
Mon 12/295:45 amYXU - SEA
3 stops18h 32mUnited Airlines
Deal found 9/16$1,487

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 September 16, 2025.
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

Fri 10/31

8:00 pm-5:05 pm

2 stops18h 05m

London

Fri 11/7

5:40 pm-10:16 pm

1 stop7h 36m

$405

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 12/22

8:00 pm-8:46 am

2 stops9h 46m

London

Mon 12/29

5:40 pm-10:16 pm

1 stop7h 36m

$605

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 10/31

10:55 pm-8:12 pm

3 stops42h 17m

London

Fri 11/7

8:10 pm-10:23 am

2 stops17h 13m

$683

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Fri 10/31

10:55 pm-8:12 pm

3 stops42h 17m

London

Fri 11/7

8:10 pm-10:23 am

3 stops41h 13m

$695

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Mon 12/22

5:02 am-9:21 pm

2 stops13h 19m

London

Mon 12/29

5:45 am-9:17 pm

3 stops18h 32m

$1,487

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

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?

    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 18h 05m. 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.

See more FAQs

Traveling to a place near London?

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Grand Bend

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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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$244Average$681FlexibilityNo cancel feeOn-time67%

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