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Cheap flights from Seattle to Toronto Pearson Intl Airport from C$ 125

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 16/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
9 Apr — 16 Apr1
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 68 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 10 March 2026.

Wed 29/410:30 a.m.
SEA
-
YYZ
1 stop9h 15m
WestJet
Tue 12/51:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 5/3C$ 296
Wed 27/58:00 a.m.
SEA
-
YYZ
Nonstop4h 50m
Air Canada
Tue 2/66:45 p.m.
YYZ
-
SEA
Nonstop5h 23m
Air Canada
Deal found 8/3C$ 319
Sat 18/48:00 a.m.
SEA
-
YYZ
Nonstop4h 54m
Air Canada
Sat 25/47:30 p.m.
YYZ
-
SEA
Nonstop5h 23m
Air Canada
Deal found 8/3C$ 331
Sat 25/48:00 a.m.
SEA
-
YYZ
Nonstop4h 54m
Air Canada
Fri 1/512:30 a.m.
YYZ
-
SEA
2 stops12h 20m
Air Canada
Deal found 9/3C$ 333
Mon 20/43:10 p.m.
SEA
-
YYZ
2 stops11h 48m
WestJet
Mon 27/41:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 5/3C$ 335
Fri 10/411:55 a.m.
SEA
-
YYZ
2 stops8h 43m
WestJet
Wed 15/47:45 a.m.
YYZ
-
SEA
1 stop9h 34m
WestJet
Deal found 5/3C$ 344

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 10 March 2026.

Round-trip from

C$ 296

One-way from

C$ 125

Popular in

December

Cheapest in

January

Average price

C$ 433

Good round-trip deal

C$ 880 or less

Good one-way deal

C$ 135 or less
WestJet
  • WestJet
  • 29/4-12/5
  • 2 total stops
  • 17h 30m total
  • Seattle to Toronto
Search Deals
WestJet
  • WestJet
  • 16/5
  • 2 total stops
  • 10h 29m total
  • Seattle to Toronto
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 25 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 March 2026
Search Deals
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.
Search Deals

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 10 March 2026.
Use the filters below to find and compare flights from Seattle to Toronto Pearson Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 2/4

8:09 a.m.-3:45 p.m.

Nonstop4h 36m

Toronto Pearson Intl

Sun 19/4

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

1 stop9h 34m

C$ 399

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 1/4

8:55 a.m.-9:32 p.m.

1 stop9h 37m

Toronto Pearson Intl

Sun 5/4

7:00 a.m.-11:48 a.m.

1 stop7h 48m

C$ 406

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 8/4

7:00 a.m.-8:44 p.m.

1 stop10h 44m

Toronto Pearson Intl

Wed 15/4

1:00 p.m.-10:42 p.m.

1 stop12h 42m

C$ 406

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 31/3

11:59 p.m.-9:54 a.m.

1 stop6h 55m

Toronto Pearson Intl

Sat 4/4

3:53 p.m.-11:12 p.m.

1 stop10h 19m

C$ 418

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 13/4

10:35 p.m.-9:54 a.m.

1 stop8h 19m

Toronto Pearson Intl

Fri 17/4

2:45 p.m.-12:34 a.m.

1 stop12h 49m

C$ 436

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 7/5

11:55 p.m.-12:19 p.m.

1 stop9h 24m

Toronto Pearson Intl

Sun 10/5

2:20 p.m.-10:48 p.m.

1 stop11h 28m

C$ 439
Quickest round-trip

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 31/3

8:09 a.m.-3:45 p.m.

Nonstop4h 36m

Toronto Pearson Intl

Sat 4/4

4:55 p.m.-7:25 p.m.

Nonstop5h 30m

C$ 447

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 9/7

7:35 p.m.-5:45 a.m.

1 stop7h 10m

Toronto Pearson Intl

Fri 17/7

12:00 p.m.-6:45 p.m.

2 stops9h 45m

C$ 463

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 23/5

11:02 a.m.-9:32 p.m.

1 stop7h 30m

Toronto Pearson Intl

Tue 26/5

5:15 p.m.-11:59 p.m.

1 stop9h 44m

C$ 481

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 1/5

8:30 p.m.-11:32 a.m.

2 stops12h 02m

Toronto Pearson Intl

Mon 4/5

7:22 p.m.-11:54 p.m.

1 stop7h 32m

C$ 500

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/3

Showing 1-10 of 22 resultsSorted by cheapest first
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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 6 March 2026.

The best time to book flights from Seattle to Toronto Pearson Intl Airport is 68 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, January is the cheapest month in which you can book a flight from Seattle to Toronto Pearson Intl Airport (average of C$ 179). Flying from Seattle to Toronto Pearson Intl Airport in May is currently the most expensive (average of C$ 382). 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 10 March 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 10 March 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
12,018 reviews
Check prices

Overall

8.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

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
12,018 reviews
Alaska Airlines
8.0
Very good
12,018 reviews
Check prices

Overall

8.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

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
3,288 reviews
Alaska Airlines
8.0
Very good
12,018 reviews
Check prices

Overall

8.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

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
10,800 reviews
Alaska Airlines
8.0
Very good
12,018 reviews
Check prices

Overall

8.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

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 3 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 can get you from Seattle to Toronto Pearson Intl Airport in just under 9h 37m. Your travel time can differ by up to . There are 3306 km between Seattle and Toronto Pearson Intl Airport.

  • 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$ 280. Additional round-trip tickets that might be worth considering are offered by Alaska Airlines and Air Canada, with the lowest prices starting at C$ 300 and C$ 358, respectively. WestJet is priced at 45% 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$ 127 on Alaska Airlines. Other airlines that offer cheap prices include WestJet from C$ 135 and Air Canada from C$ 135 one-way.

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

    Consider Alaska Airlines (87%), Hawaiian Airlines (87%) or Qatar Airways (87%) 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$ 127. While the most popular route (Seattle/Tacoma Intl - Toronto Pearson Intl) can be booked for C$ 354 on average, our data indicates C$ 580 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, January is the cheapest month in which you can book a flight from Seattle to Toronto Pearson Intl Airport (average of C$ 179). Flying from Seattle to Toronto Pearson Intl Airport in May is currently the most expensive (average of C$ 382). 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
Collingwood
Oakville
Markham
Kitchener
Vaughan
Barrie
Burlington
Richmond Hill
Muskoka
Cambridge
Milton
Waterloo
Oshawa
Guelph
Peterborough
St. Catharines
Brantford
Lindsay
Cobourg

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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.
Seattle to Hamilton flights
Portland to Pearson Intl flights
Seattle to Region of Waterloo Intl flights
Spokane to Pearson Intl flights
Pasco to Pearson Intl flights
Bellingham 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 10 March 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 280AverageC$ 430FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 300AverageC$ 692FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapestC$ 358AverageC$ 454FlexibilityNo 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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