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Cheap flights from Seattle (SEA) to London (YXU) from $219

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 8/27. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SEA — YXU
Jun 2 — Jun 91
From?
To?
Sun 6/2
Sun 6/9
1 adult, Economy
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Cheap flight deals from Seattle to London

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to London (YXU). 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 May 28, 2024.

Round-trip from

$230
From Seattle/Tacoma Intl to London
Search Deals

When is the cheapest time to fly from Seattle to London, Ontario (SEA - YXU)?

It’s optimal to fly from Seattle to London, Ontario in the morning. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight at noon.

Cheap Air Canada flights from Seattle to London

Explore cheap flight options specifically provided by Air Canada for the route between Seattle and London. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,740,132 searches. Data last updated May 28, 2024.
Take a look at some of the lowest-priced Air Canada flights heading from Seattle to London. Make sure to double check the flight details before booking.
Mon 6/311:40 amSEA - YXU
1 stop6h 56mAir Canada
Tue 6/116:00 amYXU - SEA
1 stop7h 43mAir Canada
Deal found 5/27$534
Mon 6/311:40 amSEA - YXU
1 stop6h 56mAir Canada
Tue 6/116:00 amYXU - SEA
2 stops9h 27mAir Canada
Deal found 5/27$539
Mon 6/37:05 pmSEA - YXU
2 stops11h 11mAir Canada
Tue 6/116:00 amYXU - SEA
2 stops9h 27mAir Canada
Deal found 5/27$544
Wed 10/235:50 amSEA - YXU
2 stops8h 57mAir Canada
Sat 10/266:00 amYXU - SEA
1 stop7h 46mAir Canada
Deal found 5/27$550
Wed 10/237:05 pmSEA - YXU
2 stops11h 12mAir Canada
Sat 10/263:25 pmYXU - SEA
2 stops9h 55mAir Canada
Deal found 5/27$555
Thu 6/63:10 pmSEA - YXU
2 stops15h 06mAir Canada
Sun 6/96:00 amYXU - SEA
1 stop7h 43mAir Canada
Deal found 5/27$562
Thu 6/63:10 pmSEA - YXU
2 stops15h 06mAir Canada
Sun 6/96:00 amYXU - SEA
2 stops18h 16mAir Canada
Deal found 5/27$660

Cheap WestJet flights from Seattle to London

Explore cheap flight options specifically provided by WestJet for the route between Seattle and London. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,740,132 searches. Data last updated May 28, 2024.
Have a look at some of the cheapest available WestJet flights departing from Seattle and landing in London. Deals are refreshing constantly so come back soon for more options.
Thu 6/67:00 amSEA - YXU
1 stop19h 30mWestJet
Sun 6/98:00 pmYXU - SEA
1 stop27h 20mWestJet
Deal found 5/27$520
Wed 10/231:50 pmSEA - YXU
1 stop26h 21mWestJet
Sat 10/268:00 pmYXU - SEA
1 stop20h 00mWestJet
Deal found 5/27$599

Cheap Seattle to London flights in May & June 2024

Find cheap flight options from Seattle to London specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,740,132 searches. Prices were last updated on May 28, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. Check back regularly for other flight deals.
Thu 6/67:00 amSEA - YXU
1 stop19h 30mWestJet
Sun 6/98:00 pmYXU - SEA
1 stop27h 20mWestJet
Deal found 5/27$520
Mon 6/311:40 amSEA - YXU
1 stop6h 56mAir Canada
Tue 6/116:00 amYXU - SEA
1 stop7h 43mAir Canada
Deal found 5/27$534
Mon 6/311:40 amSEA - YXU
1 stop6h 56mAir Canada
Tue 6/116:00 amYXU - SEA
2 stops9h 27mAir Canada
Deal found 5/27$539
Mon 6/37:05 pmSEA - YXU
2 stops11h 11mAir Canada
Tue 6/116:00 amYXU - SEA
2 stops9h 27mAir Canada
Deal found 5/27$544
Thu 6/63:10 pmSEA - YXU
2 stops15h 06mAir Canada
Sun 6/96:00 amYXU - SEA
1 stop7h 43mAir Canada
Deal found 5/27$562
Thu 6/63:10 pmSEA - YXU
2 stops15h 06mAir Canada
Sun 6/96:00 amYXU - SEA
2 stops18h 16mAir Canada
Deal found 5/27$660
Tue 5/281:50 pmSEA - YXU
1 stop26h 23mWestJet
Fri 5/318:00 pmYXU - SEA
1 stop19h 56mWestJet
Deal found 5/27$746
Tue 5/281:50 pmSEA - YXU
1 stop26h 23mWestJet
Fri 5/318:00 pmYXU - SEA
2 stops45h 49mWestJet
Deal found 5/27$880
Thu 6/69:32 pmSEA - YXU
2 stops28h 58mMultiple Airlines
Sun 6/98:00 pmYXU - SEA
3 stops27h 09mMultiple Airlines
Deal found 5/27$951

Seattle to London 2024 flight deals

Discover exclusive flight deals for travel between Seattle and London in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,740,132 searches. Data last updated May 28, 2024.
Listed are some of the best fares we've found on flights departing from Seattle to London in 2024. Check back regularly for other flight deals.
Thu 6/67:00 amSEA - YXU
1 stop19h 30mWestJet
Sun 6/98:00 pmYXU - SEA
1 stop27h 20mWestJet
Deal found 5/27$520
Mon 6/311:40 amSEA - YXU
1 stop6h 56mAir Canada
Tue 6/116:00 amYXU - SEA
1 stop7h 43mAir Canada
Deal found 5/27$534
Mon 6/311:40 amSEA - YXU
1 stop6h 56mAir Canada
Tue 6/116:00 amYXU - SEA
2 stops9h 27mAir Canada
Deal found 5/27$539
Mon 6/37:05 pmSEA - YXU
2 stops11h 11mAir Canada
Tue 6/116:00 amYXU - SEA
2 stops9h 27mAir Canada
Deal found 5/27$544
Wed 10/235:50 amSEA - YXU
2 stops8h 57mAir Canada
Sat 10/266:00 amYXU - SEA
1 stop7h 46mAir Canada
Deal found 5/27$550
Wed 10/237:05 pmSEA - YXU
2 stops11h 12mAir Canada
Sat 10/263:25 pmYXU - SEA
2 stops9h 55mAir Canada
Deal found 5/27$555
Thu 6/63:10 pmSEA - YXU
2 stops15h 06mAir Canada
Sun 6/96:00 amYXU - SEA
1 stop7h 43mAir Canada
Deal found 5/27$562
Wed 10/231:50 pmSEA - YXU
1 stop26h 21mWestJet
Sat 10/268:00 pmYXU - SEA
1 stop20h 00mWestJet
Deal found 5/27$599
Thu 6/63:10 pmSEA - YXU
2 stops15h 06mAir Canada
Sun 6/96:00 amYXU - SEA
2 stops18h 16mAir Canada
Deal found 5/27$660

Seattle to London flights leaving soon

Find last-minute flight options from Seattle to London for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,740,132 searches. Data last updated May 28, 2024.
Have a look at some of the flights available from Seattle to London departing last-minute. It's wise to confirm all flight details are correct before booking.
Thu 6/67:00 amSEA - YXU
1 stop19h 30mWestJet
Sun 6/98:00 pmYXU - SEA
1 stop27h 20mWestJet
Deal found 5/27$520
Mon 6/311:40 amSEA - YXU
1 stop6h 56mAir Canada
Tue 6/116:00 amYXU - SEA
1 stop7h 43mAir Canada
Deal found 5/27$534
Mon 6/311:40 amSEA - YXU
1 stop6h 56mAir Canada
Tue 6/116:00 amYXU - SEA
2 stops9h 27mAir Canada
Deal found 5/27$539
Mon 6/37:05 pmSEA - YXU
2 stops11h 11mAir Canada
Tue 6/116:00 amYXU - SEA
2 stops9h 27mAir Canada
Deal found 5/27$544
Thu 6/63:10 pmSEA - YXU
2 stops15h 06mAir Canada
Sun 6/96:00 amYXU - SEA
1 stop7h 43mAir Canada
Deal found 5/27$562
Thu 6/63:10 pmSEA - YXU
2 stops15h 06mAir Canada
Sun 6/96:00 amYXU - SEA
2 stops18h 16mAir Canada
Deal found 5/27$660
Thu 6/69:32 pmSEA - YXU
2 stops28h 58mMultiple Airlines
Sun 6/98:00 pmYXU - SEA
3 stops27h 09mMultiple Airlines
Deal found 5/27$951

One-way flights to London from Seattle

Search for one-way flight options from Seattle to London. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,740,132 searches. Data last updated May 28, 2024.
Users traveling one-way from Seattle to London can select one of these great deals. Users can also find round-trip Seattle to London flights by using the search form above.
Tue 8/276:15 pmSEA - YXU
1 stop8h 03mWestJet
Deal found 5/27$219
Wed 10/237:00 amSEA - YXU
1 stop9h 11mWestJet
Deal found 5/27$235
Sat 6/1511:10 pmSEA - YXU
1 stop12h 36mAir Canada
Deal found 5/27$274
Wed 10/235:00 pmSEA - YXU
2 stops23h 11mMultiple Airlines
Deal found 5/27$331
Sat 6/157:05 pmSEA - YXU
2 stops16h 41mAir Canada
Deal found 5/28$338
Wed 10/231:35 pmSEA - YXU
3 stops26h 36mMultiple Airlines
Deal found 5/27$350
Tue 8/275:35 pmSEA - YXU
2 stops8h 43mWestJet
Deal found 5/27$387
Sat 6/159:55 pmSEA - YXU
2 stops18h 04mWestJet
Deal found 5/27$424

Find flights from Seattle to London within your budget

Customize your flight search to find flights from Seattle 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 2,740,132 searches. Data last updated May 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$550 - $1,108

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 10/23

2 stops8h 57m

London

Sat 10/26

1 stop7h 46m

$550

Seattle/Tacoma IntlLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 10/23

2 stops11h 12m

London

Sat 10/26

2 stops9h 55m

$555

Seattle/Tacoma IntlLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 10/23

1 stop26h 21m

London

Sat 10/26

1 stop20h 00m

$599

Seattle/Tacoma IntlLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Wed 10/23

3 stops22h 57m

London

Sat 10/26

2 stops12h 42m

$1,108

Flights are sorted by cheapest first

Deals found on 5/27

When is the cheapest time to fly from Seattle to London, Ontario?

Use this chart to determine the cheapest time to fly round-trip from Seattle to London. Price data was last updated on April 28, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to London, Ontario flight should consider departing on Friday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Seattle to London

Have a flexible travel schedule? Discover the best time to fly to London from Seattle 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.

Temperature and rainfall in London by month

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

YXU

Temperature

21.2 - 68 °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 May 28, 2024.
Get a feel of what it's like to fly with Air Canada and WestJet from Seattle to London by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
WestJet
7.5
Good
2,871 reviews
Check prices

Boarding

7.7

Food

6.4

Entertainment

6.4

Comfort

7.3

Crew

8.1

Overall

7.5

Reviews

1 / 10

System was down and the line on the check in counter was very slow.

WestJet
7.5
Good
2,871 reviews
WestJet
7.5
Good
2,871 reviews
Check prices

Boarding

7.7

Food

6.4

Entertainment

6.4

Comfort

7.3

Crew

8.1

Overall

7.5

Reviews

1 / 10

System was down and the line on the check in counter was very slow.

Air Canada
7.0
Good
6,988 reviews
WestJet
7.5
Good
2,871 reviews
Check prices

Boarding

7.7

Food

6.4

Entertainment

6.4

Comfort

7.3

Crew

8.1

Overall

7.5

Reviews

1 / 10

System was down and the line on the check in counter was very slow.

Related info for your journey

Find useful and relevant information for your journey from Seattle to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find flights from Seattle to London, Ontario for under $600 on Cheapflights?

    Yes, there are multiple flights from Seattle to London, Ontario for under $600. The cheapest flight booked recently is on Air Canada for just $550, but on average you can expect to pay $703.

  • Are there last-minute flights available from Seattle to London, Ontario for under $600?

    There are currently 7+ open flights from Seattle to London, Ontario within the next 7 days for less than $600.

  • What are the cheapest airlines flying from Seattle to London, Ontario round-trip?

    Cheapflights users have booked flights from Seattle to London, Ontario round-trip from $550. Another airline that can offer you cheap pricing is WestJet.

  • What does SEA to YXU mean?

    SEA stands for Seattle/Tacoma Intl Airport, while YXU stands for London Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Can I find deals for flights from Seattle to London that include extra baggage allowance?

    The amount of baggage you can bring on your Seattle to London flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Seattle to London with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to London flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle 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.

  • Can I find deals for flights from Seattle to London that allow pets onboard?

    Many airlines flying from Seattle to London offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Seattle to London?

    Yes, you can often find last-minute deals on Seattle to London flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Seattle to London, Ontario flight deals updated?

    The Seattle to London, Ontario flight deals you see on this page were last updated on 5/27.

See more FAQs

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See prices for flight routes from nearby airports that may be better suited for you.

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Top airline flying from Seattle to London

Discover the top airline that operate flights from Seattle 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 2,740,132 searches. Data last updated May 28, 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$444Average$513FlexibilityNo cancel feeOn-time67%
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Search flights from Seattle to London by cabin class

Find flights from Seattle to London, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

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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 Seattle 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 Seattle today with Cheapflights!

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Seattle to London for you. Better yet — we are completely free to use.

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

Need flexible booking options for your flight to London from Seattle? 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 Seattle to London become cheaper?

Of course! You can now track prices for flights from Seattle to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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