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Cheap flights from Seattle to Toronto Pearson Intl Airport from C$ 127

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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
23 Feb — 2 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Toronto Pearson Intl are usually found in January or February, booked 82 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap flight deals from Seattle to Pearson Intl

Enter your travel dates to find the best prices.

Cheapest flights from Seattle to Pearson Intl
Explore the most affordable flight options available from Seattle to Pearson Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 January 2026.

Tue 10/38:10 a.m.
SEA
-
YYZ
Nonstop4h 43m
Air Canada
Tue 17/38:00 a.m.
YYZ
-
SEA
1 stop10h 01m
Air Canada
Deal found 24/1C$ 303
Sat 28/28:00 a.m.
SEA
-
YYZ
Nonstop4h 43m
Air Canada
Sat 7/37:50 p.m.
YYZ
-
SEA
Nonstop5h 26m
Air Canada
Deal found 23/1C$ 304
Sat 21/28:00 a.m.
SEA
-
YYZ
Nonstop4h 43m
Air Canada
Sat 28/28:00 a.m.
YYZ
-
SEA
1 stop9h 31m
Air Canada
Deal found 23/1C$ 305
Tue 10/37:55 a.m.
SEA
-
YYZ
Nonstop4h 40m
Alaska Airlines
Tue 17/34:45 p.m.
YYZ
-
SEA
Nonstop5h 33m
Alaska Airlines
Deal found 24/1C$ 312
Sat 28/28:00 a.m.
SEA
-
YYZ
Nonstop4h 43m
Multiple Airlines
Sat 7/34:45 p.m.
YYZ
-
SEA
Nonstop5h 33m
Multiple Airlines
Deal found 24/1C$ 316

Find flight deals from Seattle to Pearson Intl

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Pearson Intl (YYZ). 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 24 January 2026.

Round-trip from

C$ 303

One-way from

C$ 127

Popular in

December

Cheapest in

January

Average price

C$ 365

Good round-trip deal

C$ 323 or less

Good one-way deal

C$ 113 or less
Air Canada
  • Air Canada
  • 10/3-17/3
  • 1 total stop
  • 14h 44m total
  • Seattle to Toronto
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3/3
  • 3/3
  • 3 total stops
  • 25h 05m total
  • Seattle to Toronto
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Toronto Pearson Intl.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Toronto Pearson Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Pearson Intl 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 629,999 searches. Data last updated 24 January 2026.
Use the filters below to find and compare flights from Seattle to Toronto Pearson Intl Airport that are best for you.

Fly from

Seattle

Fly to

Pearson Intl

Route

Depart

Return

Price

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 4/3

5:00 a.m.-3:02 p.m.

1 stop7h 02m

Toronto Pearson Intl

Wed 4/3

5:30 p.m.-10:43 p.m.

1 stop8h 13m

C$ 348

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 24/4

7:55 a.m.-3:45 p.m.

Nonstop4h 50m

Toronto Pearson Intl

Sat 25/4

4:55 p.m.-7:23 p.m.

Nonstop5h 28m

C$ 362

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 11/3

7:55 a.m.-3:35 p.m.

Nonstop4h 40m

Toronto Pearson Intl

Mon 16/3

4:45 p.m.-7:18 p.m.

Nonstop5h 33m

C$ 362

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 24/4

7:55 a.m.-3:45 p.m.

Nonstop4h 50m

Toronto Pearson Intl

Wed 29/4

4:55 p.m.-7:23 p.m.

Nonstop5h 28m

C$ 362

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 23/4

7:55 a.m.-3:45 p.m.

Nonstop4h 50m

Toronto Pearson Intl

Wed 29/4

4:55 p.m.-7:23 p.m.

Nonstop5h 28m

C$ 376

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 2/3

7:55 a.m.-3:35 p.m.

Nonstop4h 40m

Toronto Pearson Intl

Tue 10/3

4:45 p.m.-7:18 p.m.

Nonstop5h 33m

C$ 376

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 1/3

7:55 a.m.-3:35 p.m.

Nonstop4h 40m

Toronto Pearson Intl

Tue 10/3

4:45 p.m.-7:18 p.m.

Nonstop5h 33m

C$ 376

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 12/3

8:10 a.m.-3:53 p.m.

Nonstop4h 43m

Toronto Pearson Intl

Sun 15/3

7:50 p.m.-10:16 p.m.

Nonstop5h 26m

C$ 377

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 27/3

7:55 a.m.-3:35 p.m.

Nonstop4h 40m

Toronto Pearson Intl

Mon 30/3

7:45 a.m.-2:19 p.m.

1 stop9h 34m

C$ 380

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 21/2

8:17 a.m.-6:57 p.m.

1 stop7h 40m

Toronto Pearson Intl

Sat 28/2

10:51 a.m.-9:12 p.m.

2 stops13h 21m

C$ 395

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/1

Showing 1-10 of 23 results
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Best time to book a flight from Seattle to Pearson Intl

Have a flexible travel schedule? Discover the best time to fly to Pearson Intl 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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Toronto Pearson Intl Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Pearson Intl. Price data was last updated on 16 January 2026.

The best time to book flights from Seattle to Toronto Pearson Intl Airport is 82 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, April is the cheapest month in which you can book a flight from Seattle to Toronto Pearson Intl Airport (average of C$ 168). Flying from Seattle to Toronto Pearson Intl Airport in December is currently the most expensive (average of C$ 387). 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 SEA to YYZ?

Find hourly flight availability from Seattle to Pearson Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 24 January 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Toronto Pearson Intl Airport as you normally would.

Reviews of airlines servicing Pearson Intl

Get insights into the airlines that provide service to Pearson Intl. 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 Pearson Intl. Reviews last updated 24 January 2026.
Get a feel of what it's like to fly with Alaska Airlines,WestJet, andAir Canada from Seattle to Toronto Pearson Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,787 reviews
Check prices

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
8.0
Very good
11,787 reviews
Alaska Airlines
8.0
Very good
11,787 reviews
Check prices

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
WestJet
7.2
Good
3,250 reviews
Alaska Airlines
8.0
Very good
11,787 reviews
Check prices

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Air Canada
7.1
Good
10,653 reviews
Alaska Airlines
8.0
Very good
11,787 reviews
Check prices

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Boarding

8.1

Food

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

Related info for your journey

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

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Toronto Pearson Intl. On average, Seattle/Tacoma Intl has 4 outbound flights to Toronto Pearson Intl per day from 3 airlines. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

  • How long is the flight from Seattle to Toronto Pearson Intl Airport?

    United Airlines and Alaska Airlines can get you from Seattle to Toronto Pearson Intl Airport in just under 4h 50m. Your travel time can differ by up to 2h 12m. There are 3306 km between Seattle and Toronto Pearson Intl Airport. Both multi-stop and direct flights can be found to your destination and back.

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

    Flying on WestJet is currently your cheapest option to Toronto Pearson Intl Airport, with prices starting at C$ 284. Additional round-trip tickets that might be worth considering are offered by Alaska Airlines and Air Canada, with the lowest prices starting at C$ 304 and C$ 363, respectively. WestJet is priced at 46% lower than the current average price of a flight leaving 3 months from now.

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

    One-way options have recently been found by users for as low as C$ 137 on WestJet. Other airlines that offer cheap prices include Air Canada from C$ 137 and Alaska Airlines from C$ 153 one-way.

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

    Consider Air Canada (85%), United Airlines (85%) or Alaska Airlines (83%) when booking your flight. These represent the most reliable airlines when flying from Seattle to Toronto Pearson Intl Airport.

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

    Looking at all options, your cheapest flight can be booked for C$ 113. While the most popular route (Seattle/Tacoma Intl - Toronto Pearson Intl) can be booked for C$ 316 on average, our data indicates C$ 281 when flying from Seattle to Toronto Pearson Intl Airport.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Pearson Intl 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 Seattle to Toronto Pearson Intl Airport?

    Currently, April is the cheapest month in which you can book a flight from Seattle to Toronto Pearson Intl Airport (average of C$ 168). Flying from Seattle to Toronto Pearson Intl Airport in December is currently the most expensive (average of C$ 387). 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
Brampton
Oakville
Collingwood
Kitchener
Markham
Vaughan
Burlington
Barrie
Richmond Hill
Milton
Cambridge
Muskoka
Waterloo
Guelph
Lindsay
Pickering
Peterborough
Brantford
Oshawa
St. Catharines

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Alternative routes for Seattle to Pearson Intl

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Pearson Intl flights
Seattle to Hamilton flights
Seattle to Region of Waterloo Intl flights
Bellingham to Pearson Intl flights
Spokane to Pearson Intl flights
Pasco to Pearson Intl flights

Top 3 airlines flying from Seattle to Pearson Intl

Discover the top 3 airlines that operate flights from Seattle to Pearson Intl. 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 629,999 searches. Data last updated 24 January 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 284AverageC$ 388FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 304AverageC$ 781FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapestC$ 363AverageC$ 525FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

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 Pearson Intl?

Deals for Seattle to Pearson Intl flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

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

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

Yes! Cheapflights helps users easily find flights from Seattle to Pearson Intl with no change fees.

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

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