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$128+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YXU
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$288
(Trip.com)

One-way from

$128
(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.
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From Washington to London
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One-way flight 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 March 28, 2025.

This Trip.com deal was found by Cheapflights users on 3/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/107:05 amSEA - YXU
1 stop9h 04mWestJet
Sat 5/176:00 amYXU - SEA
1 stop17h 28mWestJet
Deal found 3/27$288
This Mytrip deal was found by Cheapflights users on 3/27. 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.
Sat 5/107:05 amSEA - YXU
1 stop9h 04mMultiple Airlines
Sat 5/176:00 amYXU - SEA
3 stops21h 10mMultiple Airlines
Deal found 3/27$401
This Air Canada deal was found by Cheapflights users on 3/27. 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 5/117:15 pmSEA - YXU
2 stops11h 03mAir Canada
Sun 5/189:55 amYXU - SEA
2 stops11h 38mAir Canada
Deal found 3/27$628
This United Airlines deal was found by Cheapflights users on 3/27. 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.
Sun 5/117:00 amSEA - YXU
2 stops23h 18mUnited Airlines
Sun 5/183:35 pmYXU - SEA
3 stops29h 55mUnited Airlines
Deal found 3/27$763

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 March 28, 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

Sat 5/10

7:05 am-7:09 pm

1 stop9h 04m

London

Sat 5/17

6:00 am-8:28 pm

1 stop17h 28m

$288

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sat 5/10

7:05 am-7:09 pm

1 stop9h 04m

London

Sat 5/17

6:00 am-12:10 am

3 stops21h 10m

$401

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 5/11

7:15 pm-9:18 am

2 stops11h 03m

London

Sun 5/18

9:55 am-6:33 pm

2 stops11h 38m

$628

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 5/11

7:00 am-9:18 am

2 stops23h 18m

London

Sun 5/18

3:35 pm-6:30 pm

3 stops29h 55m

$763

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 5/8

7:05 am-7:09 pm

1 stop9h 04m

$128

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 5/8

6:00 am-5:14 am

2 stops20h 14m

$189

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 7/30

12:20 am-2:57 pm

2 stops11h 37m

$927

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

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

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London, Ontario ranges from 2.8 - 3.9 inches per month. January is typically the wettest month, when rainfall can reach 3.9 in. March is typically the driest time to visit London, Ontario when rainfall is around 2.8 in.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of February, when temperatures are typically at their lowest (around 21.2 F).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated March 28, 2025.
United Airlines
7.4
Good
8,603 reviews

Overall

7.4

Boarding

7.7

Entertainment

7.0

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,603 reviews
United Airlines
7.4
Good
8,603 reviews

Overall

7.4

Boarding

7.7

Entertainment

7.0

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
WestJet
7.2
Good
2,785 reviews
United Airlines
7.4
Good
8,603 reviews

Overall

7.4

Boarding

7.7

Entertainment

7.0

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.0
Good
8,986 reviews
United Airlines
7.4
Good
8,603 reviews

Overall

7.4

Boarding

7.7

Entertainment

7.0

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

  • 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

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Alternative routes for Washington to London

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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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$205Average$399FlexibilityNo cancel feeOn-time67%
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