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Cheap flights from London to Seattle from C$ 355

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 21/7. 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.
YXU — SEA
3 Apr — 10 Apr1
1 adult
Wed 3/4
Wed 10/4

Cheap flight deals from London to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from London (YXU) to Seattle (SEA). 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 29 March 2024.

Popular in

November

Cheapest in

June

Round-trip from

C$ 410

One-way from

C$ 361
High demand for flights, 41% potential price rise
Best time to find cheap flights, 38% potential price drop
From London to Seattle/Tacoma Intl
One-way flight from London to Seattle/Tacoma Intl

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

Flights from London, Ontario to Seattle are generally found to be more expensive on Thursday. 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 Seattle.

What is the cheapest month to fly from London, Ontario to Seattle?

The best pricing can be found in the month of June. Prices to Seattle from London, Ontario average C$ 766. You can even find prices in June for less than C$ 766, as users have found deals to Seattle from as low as C$ 465. The month of November appears to be one of the more expensive times to travel to Seattle from London, Ontario. Flying in the targeted month can save you up to 68%.

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

One of the essential ways to save on airfare from London, Ontario to Seattle is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 21% on airfare.

Cheap Air Canada flights from London to Seattle

Explore cheap flight options specifically provided by Air Canada for the route between London and Seattle. 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 586,909 searches. Data last updated 29 March 2024.
Take a peek at the cheapest Air Canada flights we've detected travelling from London to Seattle. Make sure to double check the flight details before booking.
Wed 1/56:00 a.m.YXU - SEA
1 stop7h 43mAir Canada
Mon 6/511:10 p.m.SEA - YXU
1 stop7h 06mAir Canada
Deal found 28/3C$ 654
Wed 1/56:00 a.m.YXU - SEA
2 stops11h 27mAir Canada
Mon 6/511:10 p.m.SEA - YXU
1 stop7h 06mAir Canada
Deal found 28/3C$ 661
Sat 15/66:00 a.m.YXU - SEA
2 stops11h 27mAir Canada
Wed 19/611:10 p.m.SEA - YXU
1 stop7h 05mAir Canada
Deal found 27/3C$ 682
Wed 1/59:50 a.m.YXU - SEA
1 stop15h 08mAir Canada
Mon 6/511:10 p.m.SEA - YXU
1 stop7h 06mAir Canada
Deal found 28/3C$ 686
Wed 1/56:00 a.m.YXU - SEA
2 stops11h 27mAir Canada
Mon 6/53:10 p.m.SEA - YXU
2 stops15h 06mAir Canada
Deal found 28/3C$ 700
Thu 11/42:45 p.m.YXU - SEA
1 stop9h 08mAir Canada
Thu 9/53:10 p.m.SEA - YXU
2 stops15h 06mAir Canada
Deal found 29/3C$ 720
Sat 15/66:00 a.m.YXU - SEA
2 stops11h 27mAir Canada
Wed 19/61:10 p.m.SEA - YXU
2 stops17h 05mAir Canada
Deal found 28/3C$ 722
Thu 11/42:45 p.m.YXU - SEA
1 stop9h 08mAir Canada
Fri 3/57:05 p.m.SEA - YXU
2 stops11h 11mAir Canada
Deal found 29/3C$ 733
Fri 26/49:45 a.m.YXU - SEA
1 stop14h 08mAir Canada
Fri 3/57:05 p.m.SEA - YXU
2 stops11h 11mAir Canada
Deal found 29/3C$ 762

Cheap WestJet flights from London to Seattle

Explore cheap flight options specifically provided by WestJet for the route between London and Seattle. 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 586,909 searches. Data last updated 29 March 2024.
Take a gander at the lowest prices we've found on WestJet flights from London to Seattle. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Mon 20/56:15 a.m.YXU - SEA
1 stop9h 41mWestJet
Fri 24/53:30 p.m.SEA - YXU
2 stops11h 00mWestJet
Deal found 28/3C$ 608
Mon 20/56:15 a.m.YXU - SEA
1 stop9h 41mWestJet
Fri 24/57:00 a.m.SEA - YXU
1 stop9h 13mWestJet
Deal found 28/3C$ 792

Cheap London to Seattle flights in March & April 2024

Find cheap flight options from London to Seattle specifically for the months of March and April 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 586,909 searches. Prices were last updated on 29 March 2024.
Listed are some of the best fares we've found on flights departing from London to Seattle in 2024. More deals are always being added, so be sure to check back regularly.
Fri 26/42:45 p.m.YXU - SEA
1 stop9h 08mMultiple Airlines
Fri 3/511:10 p.m.SEA - YXU
1 stop7h 06mMultiple Airlines
Deal found 29/3C$ 719
Thu 11/42:45 p.m.YXU - SEA
1 stop9h 08mAir Canada
Thu 9/53:10 p.m.SEA - YXU
2 stops15h 06mAir Canada
Deal found 29/3C$ 720
Thu 11/42:45 p.m.YXU - SEA
1 stop9h 08mMultiple Airlines
Fri 3/511:10 p.m.SEA - YXU
1 stop7h 06mMultiple Airlines
Deal found 29/3C$ 726
Thu 11/42:45 p.m.YXU - SEA
1 stop9h 08mAir Canada
Fri 3/57:05 p.m.SEA - YXU
2 stops11h 11mAir Canada
Deal found 29/3C$ 733
Thu 11/42:45 p.m.YXU - SEA
1 stop9h 08mMultiple Airlines
Thu 9/511:10 p.m.SEA - YXU
1 stop7h 06mMultiple Airlines
Deal found 29/3C$ 743
Fri 26/49:45 a.m.YXU - SEA
1 stop14h 08mAir Canada
Fri 3/57:05 p.m.SEA - YXU
2 stops11h 11mAir Canada
Deal found 29/3C$ 762
Fri 26/49:45 a.m.YXU - SEA
1 stop14h 08mAir Canada
Fri 3/57:05 p.m.SEA - YXU
2 stops11h 11mAir Canada
Deal found 29/3C$ 765
Fri 26/46:00 a.m.YXU - SEA
2 stops11h 32mAir Canada
Fri 3/57:05 p.m.SEA - YXU
2 stops11h 11mAir Canada
Deal found 29/3C$ 856
Thu 11/46:00 a.m.YXU - SEA
2 stops9h 37mAir Canada
Thu 9/53:10 p.m.SEA - YXU
2 stops15h 06mAir Canada
Deal found 29/3C$ 874

London to Seattle 2024 flight deals

Discover exclusive flight deals for travel between London and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 586,909 searches. Data last updated 29 March 2024.
Listed are some of the best fares we've found on flights departing from London to Seattle in 2024. More deals are always being added, so be sure to check back regularly.
Mon 20/56:15 a.m.YXU - SEA
1 stop9h 41mWestJet
Fri 24/53:30 p.m.SEA - YXU
2 stops11h 00mWestJet
Deal found 28/3C$ 608
Wed 1/56:00 a.m.YXU - SEA
1 stop7h 43mAir Canada
Mon 6/511:10 p.m.SEA - YXU
1 stop7h 06mAir Canada
Deal found 28/3C$ 654
Wed 1/56:00 a.m.YXU - SEA
2 stops11h 27mAir Canada
Mon 6/511:10 p.m.SEA - YXU
1 stop7h 06mAir Canada
Deal found 28/3C$ 661
Sat 15/66:00 a.m.YXU - SEA
2 stops11h 27mAir Canada
Wed 19/611:10 p.m.SEA - YXU
1 stop7h 05mAir Canada
Deal found 27/3C$ 682
Wed 1/59:50 a.m.YXU - SEA
1 stop15h 08mAir Canada
Mon 6/511:10 p.m.SEA - YXU
1 stop7h 06mAir Canada
Deal found 28/3C$ 686
Wed 1/56:00 a.m.YXU - SEA
2 stops11h 27mAir Canada
Mon 6/53:10 p.m.SEA - YXU
2 stops15h 06mAir Canada
Deal found 28/3C$ 700
Fri 26/42:45 p.m.YXU - SEA
1 stop9h 08mMultiple Airlines
Fri 3/511:10 p.m.SEA - YXU
1 stop7h 06mMultiple Airlines
Deal found 29/3C$ 719
Thu 11/42:45 p.m.YXU - SEA
1 stop9h 08mAir Canada
Thu 9/53:10 p.m.SEA - YXU
2 stops15h 06mAir Canada
Deal found 29/3C$ 720
Sat 15/66:00 a.m.YXU - SEA
2 stops11h 27mAir Canada
Wed 19/61:10 p.m.SEA - YXU
2 stops17h 05mAir Canada
Deal found 28/3C$ 722

One-way flights to Seattle from London

Search for one-way flight options from London to Seattle. 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 586,909 searches. Data last updated 29 March 2024.
Users travelling one-way from London to Seattle can select one of these great deals. Users can also find round-trip London to Seattle flights by using the search form above.
Sun 21/76:15 a.m.YXU - SEA
2 stops11h 31mWestJet
Deal found 28/3C$ 355
Sun 21/76:15 a.m.YXU - SEA
1 stop9h 41mDelta
Deal found 28/3C$ 361
Thu 11/42:45 p.m.YXU - SEA
1 stop9h 08mUnited Airlines
Deal found 29/3C$ 374
Tue 9/42:45 p.m.YXU - SEA
2 stops21h 38mAir Canada
Deal found 29/3C$ 408
Wed 10/42:45 p.m.YXU - SEA
2 stops21h 38mAir Canada
Deal found 29/3C$ 442
Thu 11/46:00 a.m.YXU - SEA
2 stops9h 37mAir Canada
Deal found 29/3C$ 571
Mon 8/42:45 p.m.YXU - SEA
2 stops21h 38mAir Canada
Deal found 29/3C$ 597
Wed 10/42:45 p.m.YXU - SEA
1 stop9h 08mUnited Airlines
Deal found 29/3C$ 631
Thu 18/49:45 a.m.YXU - SEA
3 stops32h 32mUnited Airlines
Deal found 29/3C$ 643

Find flights from London to Seattle within your budget

Customize your flight search to find flights from London to Seattle 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 586,909 searches. Data last updated 29 March 2024.

Fly from

Any airport

Fly to

Any airport

Budget

C$ 608 - C$ 792

Route

Depart

Return

Price

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Mon 20/5

1 stop9h 41m

Seattle/Tacoma Intl

Fri 24/5

2 stops11h 00m

C$ 608

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Wed 1/5

1 stop7h 43m

Seattle/Tacoma Intl

Mon 6/5

1 stop7h 06m

C$ 654

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Wed 1/5

2 stops11h 27m

Seattle/Tacoma Intl

Mon 6/5

1 stop7h 06m

C$ 661

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Sat 15/6

2 stops11h 27m

Seattle/Tacoma Intl

Wed 19/6

1 stop7h 05m

C$ 682

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Wed 1/5

1 stop15h 08m

Seattle/Tacoma Intl

Mon 6/5

1 stop7h 06m

C$ 686

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Fri 26/4

1 stop9h 08m

Seattle/Tacoma Intl

Fri 3/5

1 stop7h 06m

C$ 719

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Thu 11/4

1 stop9h 08m

Seattle/Tacoma Intl

Fri 3/5

1 stop7h 06m

C$ 726

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Thu 11/4

1 stop9h 08m

Seattle/Tacoma Intl

Thu 9/5

1 stop7h 06m

C$ 743

LondonSeattle/Tacoma Intl

YXU - SEA

YXUSEA

London

Mon 20/5

1 stop9h 41m

Seattle/Tacoma Intl

Fri 24/5

1 stop9h 13m

C$ 792

Flights are sorted by cheapest first

Deals found on 28/3

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

Use this chart to determine the cheapest time to fly round-trip from London to Seattle. Price data was last updated on 24 March 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their London, Ontario to Seattle flight should consider departing on Saturday mornings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Seattle by month

Plan your trip from London to Seattle by taking into account the cheapest months to travel. The average price of a one-way flight from London to Seattle is currently C$ 487 while a round-trip flight costs C$ 697. Price data was last updated on 24 March 2024.

Currently, October is the cheapest month in which you can book a flight from London, Ontario to Seattle (average of C$ 302). Flying from London, Ontario to Seattle in August is currently the most expensive (average of C$ 434). 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.

January

C$ 448

February

C$ 457

March

C$ 574

April

C$ 547

May

C$ 476

June

C$ 479

July

C$ 566

August

C$ 589

September

C$ 533

October

C$ 410

November

C$ 450

December

C$ 479

Temperature and rainfall in Seattle by month

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

SEA

Temperature

5 - 19 °C

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated 29 March 2024.
See what other customers who have flown with Air Canada and WestJet from London to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
11,402 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Overall

8.1

Food

7.5

Entertainment

8.0

Reviews

1 / 10

It was a good experience other than a short delay.

8.1
Very good
11,402 reviews
8.1
Very good
11,402 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Overall

8.1

Food

7.5

Entertainment

8.0

Reviews

1 / 10

It was a good experience other than a short delay.

7.5
Good
3,036 reviews
8.1
Very good
11,402 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Overall

8.1

Food

7.5

Entertainment

8.0

Reviews

1 / 10

It was a good experience other than a short delay.

7.4
Good
11,470 reviews
8.1
Very good
11,402 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Overall

8.1

Food

7.5

Entertainment

8.0

Reviews

1 / 10

It was a good experience other than a short delay.

7.0
Good
6,744 reviews
8.1
Very good
11,402 reviews

Crew

8.6

Boarding

8.2

Comfort

7.9

Overall

8.1

Food

7.5

Entertainment

8.0

Reviews

1 / 10

It was a good experience other than a short delay.

Related info for your journey

Find useful and relevant information for your journey from London to Seattle. 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 London, Ontario to Seattle for under C$ 700 on Cheapflights?

    Yes, there are multiple flights from London, Ontario to Seattle for under C$ 700. The cheapest flight booked recently is on WestJet for just C$ 608, but on average you can expect to pay C$ 741.

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

    According to our current data, WestJet (C$ 608), and Air Canada (C$ 654) offers the cheapest pricing from London, Ontario to Seattle. WestJet is 20% cheaper than the average price of flights available within the next 90 days to this destination.

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

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 355. Users have also found prices from C$ 361 and C$ 374 on Delta and United Airlines, respectively.

  • What does YXU to SEA mean?

    YXU and SEA are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. YXU to SEA refers to a flight route from London Airport to Seattle/Tacoma Intl Airport.

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

    The amount of baggage you can bring 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 London to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter 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 London to Seattle that include hotel bookings?

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

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

    After entering your origin and destination, apply the non-stop filter on the search result page to see available direct flights.

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

    Yes. Cheapflights offers flight deals from London to Seattle 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 London to Seattle that allow pets onboard?

    Many airlines do 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.

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

    The London, Ontario to Seattle flight deals you see on this page were last updated on 29/3.

See more FAQs

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.

Top 2 airlines flying from London to Seattle

Discover the top 2 airlines that operate flights from London to Seattle. 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 586,909 searches. Data last updated 29 March 2024.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 478AverageC$ 622FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 496AverageC$ 623FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Search flights from London to Seattle by cabin class

Find flights from London to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.

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 London to Seattle?

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 Seattle from London today with Cheapflights!

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

Cheapflights helps you find that perfect flight to Seattle from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Certainly. Search results for flights to Seattle from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from London to Seattle become cheaper?

Yes, Cheapflights offers price alerts on London to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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

Yes, you can often find last-minute deals on London to Seattle 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 can I compare prices from different travel booking sites for flights from London to Seattle?

Cheapflights aggregates prices from various travel booking sites. This allows you to compare prices and choose the best deal.

Can I find deals for flights from London to Seattle that offer flexible cancellation policies?

Cancellation policies vary by airline and fare type. After entering your flight details, you can view the cancellation policies for each deal in the search results. Some deals may offer flexibility in terms of cancellation and changes.

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