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Cheap flights from Toronto Pearson Intl Airport to Seattle from £128

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 26/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
31 Mar — 7 Apr1
1 adult

Cheapflights Tip: The best prices from Toronto Pearson Intl to Seattle/Tacoma Intl are usually found in February or January, booked 42 days in advance, depart on a Monday or Wednesday and return on a Monday

Cheap flight deals from Pearson Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Pearson Intl (YYZ) 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 26 March 2025.

Round-trip from

£203

One-way from

£128

Popular in

May

Cheapest in

February

Average price

£258

Good one-way deal

£132 or less
WestJet
  • WestJet
  • 25/5-3/6
  • 2 total stops
  • 15h 15m total
  • Toronto to Seattle
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Air Canada
  • Air Canada
  • 26/5
  • Nonstop
  • 5h 21m total
  • Toronto to Seattle
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Highest demand for flights based on searches. 14% potential increase in price (£40 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£7 potential savings vs. average return price).
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Average for round-trip flights in March 2025
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Price to beat on a one-way flight from Toronto Pearson Intl to Seattle/Tacoma Intl.
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Find flight deals from Pearson Intl to Seattle

Cheapest flights from Pearson Intl to Seattle
Explore the most affordable flight options available from Pearson Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 March 2025.

Sun 25/508:00YYZ - SEA
1 stop7h 58mWestJet
Tue 3/607:05SEA - YYZ
1 stop7h 17mWestJet
Deal found 25/3£203
Thu 24/416:45YYZ - SEA
Nonstop5h 14mAlaska Airlines
Sun 27/407:15SEA - YYZ
Nonstop4h 45mAlaska Airlines
Deal found 25/3£231
Sun 25/508:30YYZ - SEA
Nonstop5h 21mUnited Airlines
Sat 31/523:50SEA - YYZ
1 stop9h 48mUnited Airlines
Deal found 25/3£239
Wed 16/406:15YYZ - SEA
1 stop11h 07mDelta
Tue 22/422:55SEA - YYZ
1 stop7h 00mDelta
Deal found 26/3£247
Thu 24/419:20YYZ - SEA
Nonstop5h 21mMultiple Airlines
Wed 30/406:00SEA - YYZ
Nonstop4h 57mMultiple Airlines
Deal found 25/3£249
Fri 9/517:20YYZ - SEA
1 stop10h 25mAmerican Airlines
Thu 15/501:10SEA - YYZ
1 stop8h 20mAmerican Airlines
Deal found 25/3£341

Cheapflights Fare Finder

Customise your flight search to find flights from Pearson Intl 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 858,174 searches. Data last updated 26 March 2025.
Use the filters below to find and compare flights from Toronto Pearson Intl Airport to Seattle that are best for you.

Fly from

Pearson Intl

Fly to

Seattle

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 25/5

08:00-12:58

1 stop7h 58m

Seattle/Tacoma Intl

Tue 3/6

07:05-17:22

1 stop7h 17m

£203

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 24/4

16:45-18:59

Nonstop5h 14m

Seattle/Tacoma Intl

Sun 27/4

07:15-15:00

Nonstop4h 45m

£231

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 25/5

08:30-10:51

Nonstop5h 21m

Seattle/Tacoma Intl

Sat 31/5

23:50-12:38

1 stop9h 48m

£239

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 16/4

06:15-14:22

1 stop11h 07m

Seattle/Tacoma Intl

Tue 22/4

22:55-08:55

1 stop7h 00m

£247

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 24/4

19:20-21:41

Nonstop5h 21m

Seattle/Tacoma Intl

Wed 30/4

06:00-13:57

Nonstop4h 57m

£249

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 9/5

17:20-00:45

1 stop10h 25m

Seattle/Tacoma Intl

Thu 15/5

01:10-12:30

1 stop8h 20m

£341

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 26/5

08:30-10:51

Nonstop5h 21m

£128

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 26/5

10:00-20:28

1 stop13h 28m

£131

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 3/5

16:45-18:59

Nonstop5h 14m

£135

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 28/4

16:18-23:00

1 stop9h 42m

£147

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 12 results
1
2

Best time to book a flight from Pearson Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Pearson Intl with our price prediction graph.
Estimated return 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 Toronto Pearson Intl Airport to Seattle

How far ahead should I book a flight from Toronto Pearson Intl Airport to Seattle?

Use this chart to determine the optimal time to book a return flight from Pearson Intl to Seattle. Price data was last updated on 21 March 2025.

The price you pay for your flight from Toronto Pearson Intl Airport to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 42 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Toronto Pearson Intl Airport to Seattle?

Currently, January is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of £622). Flying from Toronto Pearson Intl Airport to Seattle in July is currently the most expensive (average of £946). 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.

What is the cheapest time of day to fly from YYZ to SEA?

Find hourly flight availability from Pearson Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 26 March 2025.

Unlike at midday, when flights are generally more expensive, you can save up to 32% on flights from Toronto Pearson Intl Airport to Seattle by exploring options for tickets in the afternoon.

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, 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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 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 26 March 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta and United Airlines from Toronto to Seattle by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
9,792 reviews
Check prices

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very Good
9,792 reviews
Alaska Airlines
8.0
Very Good
9,792 reviews
Check prices

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very Good
7,891 reviews
Alaska Airlines
8.0
Very Good
9,792 reviews
Check prices

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,608 reviews
Alaska Airlines
8.0
Very Good
9,792 reviews
Check prices

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very Good
9,792 reviews
Check prices

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
WestJet
7.2
Good
2,785 reviews
Alaska Airlines
8.0
Very Good
9,792 reviews
Check prices

Boarding

8.2

Crew

8.5

Entertainment

7.1

Comfort

7.9

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Pearson Intl to Seattle. 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 Seattle from Toronto Pearson Intl?

    Most people fly into Seattle/Tacoma Intl (SEA) if they book a flight to Seattle from Toronto Pearson Intl. On average, Seattle/Tacoma Intl has 2 inbound flights from Toronto Pearson Intl per day from 1 airline. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • What are the cheapest airlines flying from Toronto Pearson Intl Airport to Seattle round-trip?

    WestJet, at £203, was found to be the cheapest airline from Toronto Pearson Intl Airport to Seattle.Alternate airlines flying return to your destination include Alaska Airlines and United Airlines. WestJet is currently priced 32% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Toronto Pearson Intl Airport to Seattle one-way?

    For one-way options, check prices for Air Canada. According to our data, you can fly for as low as £128. Users have also found prices from £131 and £135 on WestJet and Alaska Airlines, respectively.

  • What are the most reliable airlines from Toronto Pearson Intl Airport to Seattle?

    Before booking your flight to Seattle from Toronto Pearson Intl Airport, check out the most reliable airlines to get you to your destination on time: Air Tahiti Nui (100%), Qatar Airways (85%), Alaska Airlines( 85%).

  • What are the cheapest flights from Toronto Pearson Intl Airport to Seattle?

    While on average a flight from Toronto Pearson Intl Airport to Seattle is generally £182, our data shows the cheapest flight currently is £130. When looking at the most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl), you can expect to pay £240 for that flight.

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

    Yes. In addition to deals on Pearson Intl to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Pearson Intl to Seattle?

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

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

    Yes. Cheapflights offers flight deals from Pearson Intl 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.

  • What is the cheapest month to book a flight from Toronto Pearson Intl Airport to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of £622). Flying from Toronto Pearson Intl Airport to Seattle in July is currently the most expensive (average of £946). 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.

See more FAQs

Travelling to a place near Toronto Pearson Intl Airport?

Book flights to Toronto Pearson Intl Airport if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell

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Top airline flying from Pearson Intl to Seattle

Discover the top airline that operate flights from Pearson Intl 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 858,174 searches. Data last updated 26 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£338Average£429FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Pearson Intl to Seattle?

Cheapflights makes it easy to find Pearson Intl to Seattle flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights simply makes it quick and affordable to book flights from Pearson Intl to Seattle by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Pearson Intl to Seattle, users can toggle the no change fees filter when performing a flight search.

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

Of course! You can now track prices for flights from Pearson Intl to Seattle 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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