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Cheap flights from Seattle (SEA) to London (YXU) from $251

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 6/15. 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
May 6 — May 131
From?
To?
Mon 5/6
Mon 5/13
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 1, 2024.

Round-trip from

$230
From Seattle/Tacoma Intl to London
Search Deals

What is the cheapest day to fly round-trip from Seattle to London, Ontario?

Tuesday flights are found to be more expensive to fly from Seattle to London, Ontario. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London, Ontario.

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 14% 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 2,913,887 searches. Data last updated May 1, 2024.
Sun 8/2511:10 pmSEA - YXU
1 stop7h 05mAir Canada
Tue 8/273:20 pmYXU - SEA
1 stop9h 38mAir Canada
Deal found 4/29$531
Sun 8/2511:10 pmSEA - YXU
1 stop7h 05mAir Canada
Tue 8/279:50 amYXU - SEA
2 stops11h 36mAir Canada
Deal found 4/29$536
Sun 8/257:05 pmSEA - YXU
2 stops11h 10mAir Canada
Tue 8/276:00 amYXU - SEA
2 stops9h 30mAir Canada
Deal found 4/29$541
Mon 5/611:10 pmSEA - YXU
1 stop7h 06mAir Canada
Sat 5/113:25 pmYXU - SEA
1 stop9h 33mAir Canada
Deal found 4/30$553
Mon 5/611:10 pmSEA - YXU
1 stop7h 06mAir Canada
Sat 5/116:00 amYXU - SEA
2 stops11h 27mAir Canada
Deal found 4/30$558
Mon 5/67:05 pmSEA - YXU
2 stops11h 11mAir Canada
Sat 5/116:00 amYXU - SEA
2 stops11h 27mAir Canada
Deal found 4/30$563

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 2,913,887 searches. Prices were last updated on May 1, 2024.
Sun 5/511:10 pmSEA - YXU
1 stop7h 06mAir Canada
Sat 5/113:25 pmYXU - SEA
1 stop9h 33mAir Canada
Deal found 4/30$553
Sun 5/57:05 pmSEA - YXU
2 stops11h 11mAir Canada
Fri 5/106:00 amYXU - SEA
1 stop7h 43mAir Canada
Deal found 4/30$558
Sun 5/57:05 pmSEA - YXU
2 stops11h 11mAir Canada
Sat 5/116:00 amYXU - SEA
2 stops9h 27mAir Canada
Deal found 4/30$563

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 2,913,887 searches. Data last updated May 1, 2024.
Sun 8/256:15 pmSEA - YXU
1 stop8h 03mWestJet
Tue 8/276:15 amYXU - SEA
1 stop9h 41mWestJet
Deal found 4/30$519
Sun 8/2511:10 pmSEA - YXU
1 stop7h 05mAir Canada
Tue 8/273:20 pmYXU - SEA
1 stop9h 38mAir Canada
Deal found 4/29$531
Sun 8/2511:10 pmSEA - YXU
1 stop7h 05mAir Canada
Tue 8/279:50 amYXU - SEA
2 stops11h 36mAir Canada
Deal found 4/29$536
Sun 8/257:05 pmSEA - YXU
2 stops11h 10mAir Canada
Tue 8/276:00 amYXU - SEA
2 stops9h 30mAir Canada
Deal found 4/29$541
Sun 5/511:10 pmSEA - YXU
1 stop7h 06mAir Canada
Sat 5/113:25 pmYXU - SEA
1 stop9h 33mAir Canada
Deal found 4/30$553
Sun 5/57:05 pmSEA - YXU
2 stops11h 11mAir Canada
Fri 5/106:00 amYXU - SEA
1 stop7h 43mAir Canada
Deal found 4/30$558
Sun 5/57:05 pmSEA - YXU
2 stops11h 11mAir Canada
Sat 5/116:00 amYXU - SEA
2 stops9h 27mAir Canada
Deal found 4/30$563

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 2,913,887 searches. Data last updated May 1, 2024.
Mon 5/611:10 pmSEA - YXU
1 stop7h 06mAir Canada
Sat 5/113:25 pmYXU - SEA
1 stop9h 33mAir Canada
Deal found 4/30$553
Mon 5/611:10 pmSEA - YXU
1 stop7h 06mAir Canada
Sat 5/116:00 amYXU - SEA
2 stops11h 27mAir Canada
Deal found 4/30$558
Mon 5/67:05 pmSEA - YXU
2 stops11h 11mAir Canada
Sat 5/116:00 amYXU - SEA
2 stops11h 27mAir Canada
Deal found 4/30$563

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 2,913,887 searches. Data last updated May 1, 2024.
Sat 6/1511:10 pmSEA - YXU
1 stop7h 06mAir Canada
Deal found 4/30$251
Fri 8/27:05 pmSEA - YXU
2 stops11h 10mAir Canada
Deal found 4/30$256
Fri 8/26:15 pmSEA - YXU
1 stop8h 03mDelta
Deal found 4/30$358
Sat 6/159:55 pmSEA - YXU
2 stops28h 23mWestJet
Deal found 4/30$400

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 2,913,887 searches. Data last updated May 1, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$519 - $541

Route

Depart

Return

Price

Seattle/Tacoma IntlLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 8/25

1 stop8h 03m

London

Tue 8/27

1 stop9h 41m

$519

Seattle/Tacoma IntlLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 8/25

1 stop7h 05m

London

Tue 8/27

1 stop9h 38m

$531

Seattle/Tacoma IntlLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 8/25

1 stop7h 05m

London

Tue 8/27

2 stops11h 36m

$536

Seattle/Tacoma IntlLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Sun 8/25

2 stops11h 10m

London

Tue 8/27

2 stops9h 30m

$541

Flights are sorted by cheapest first

Deals found on 4/30

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.
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Average price of flights to London by month

Plan your trip from Seattle to London by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to London is currently $316 while a round-trip flight costs $532. Price data was last updated on April 28, 2024.

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 1, 2024.
Delta
8.1
Very good
10,874 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.1
Very good
10,874 reviews
Delta
8.1
Very good
10,874 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

WestJet
7.6
Good
2,970 reviews
Delta
8.1
Very good
10,874 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Air Canada
7.0
Good
6,888 reviews
Delta
8.1
Very good
10,874 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.1

Comfort

7.9

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

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 WestJet for just $519, but on average you can expect to pay $531.

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

    There are currently 3+ 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 $519. Another airline that can offer you cheap pricing is Air Canada.

  • What are the cheapest airlines to fly from Seattle to London, Ontario one-way?

    The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as $251. However, be on the lookout for offers from Delta and WestJet, as they are both options that can get you from Seattle to London, Ontario for a low price.

  • 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 4/30.

See more FAQs

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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 2,913,887 searches. Data last updated May 1, 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.
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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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