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Cheap flights from Seattle to Toronto Pearson Intl Airport from C$ 141

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 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
27 Nov — 4 Dec1
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 70 days in advance, depart on a Wednesday or Sunday and return on a Thursday

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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 28 October 2025.

Sat 29/117:57 a.m.SEA - YYZ
Nonstop4h 38mAlaska Airlines
Sat 6/124:45 p.m.YYZ - SEA
Nonstop5h 33mAlaska Airlines
Deal found 26/10C$ 313
Wed 3/123:15 p.m.SEA - YYZ
2 stops11h 43mWestJet
Wed 10/127:00 a.m.YYZ - SEA
1 stop10h 20mWestJet
Deal found 26/10C$ 318
Sat 29/117:57 a.m.SEA - YYZ
Nonstop4h 38mAlaska Airlines
Tue 2/124:45 p.m.YYZ - SEA
Nonstop5h 33mAlaska Airlines
Deal found 27/10C$ 320
Sat 29/1111:55 a.m.SEA - YYZ
2 stops8h 44mWestJet
Tue 2/127:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Deal found 27/10C$ 324
Sat 6/1211:55 a.m.SEA - YYZ
2 stops8h 44mWestJet
Wed 10/127:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Deal found 26/10C$ 327
Wed 3/123:15 p.m.SEA - YYZ
2 stops11h 43mWestJet
Sun 7/127:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Deal found 27/10C$ 330
Tue 2/127:55 a.m.SEA - YYZ
Nonstop4h 40mMultiple Airlines
Sun 7/127:45 a.m.YYZ - SEA
1 stop9h 35mMultiple Airlines
Deal found 26/10C$ 333
Fri 12/123:10 p.m.SEA - YYZ
2 stops11h 48mWestJet
Tue 16/127:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Deal found 27/10C$ 334
Sat 29/1111:55 a.m.SEA - YYZ
2 stops8h 44mWestJet
Sat 6/1210:15 p.m.YYZ - SEA
2 stops15h 07mWestJet
Deal found 26/10C$ 336
Sat 29/117:57 a.m.SEA - YYZ
Nonstop4h 38mMultiple Airlines
Sat 6/1210:15 p.m.YYZ - SEA
2 stops15h 07mMultiple Airlines
Deal found 26/10C$ 341
Thu 20/117:55 a.m.SEA - YYZ
Nonstop4h 40mMultiple Airlines
Mon 24/117:45 a.m.YYZ - SEA
1 stop9h 35mMultiple Airlines
Deal found 26/10C$ 343
Thu 4/123:10 p.m.SEA - YYZ
2 stops11h 48mWestJet
Sun 7/127:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Deal found 27/10C$ 345

Cheap 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 28 October 2025.

Round-trip from

C$ 313

One-way from

C$ 141

Popular in

June

Cheapest in

January

Average price

C$ 519

Good round-trip deal

C$ 380 or less

Good one-way deal

C$ 223 or less
Alaska Airlines
  • Alaska Airlines
  • 29/11-6/12
  • Nonstop
  • 10h 11m total
  • Seattle to Toronto
Search Deals
Alaska Airlines
  • Alaska Airlines
  • 18/11
  • Nonstop
  • 4h 40m total
  • Seattle to Toronto
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 85 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 28 October 2025.
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

Sat 15/11

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

Nonstop4h 40m

Toronto Pearson Intl

Wed 19/11

4:45 p.m.-7:05 p.m.

Nonstop5h 20m

C$ 351

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 6/12

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

Nonstop4h 40m

Toronto Pearson Intl

Sat 13/12

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

Nonstop5h 33m

C$ 351

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 3/12

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

Nonstop4h 40m

Toronto Pearson Intl

Wed 10/12

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

Nonstop5h 33m

C$ 351

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 18/2

8:00 a.m.-3:35 p.m.

Nonstop4h 35m

Toronto Pearson Intl

Sat 21/2

4:45 p.m.-7:05 p.m.

Nonstop5h 20m

C$ 351

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 19/2

8:00 a.m.-3:35 p.m.

Nonstop4h 35m

Toronto Pearson Intl

Sat 21/2

4:45 p.m.-7:05 p.m.

Nonstop5h 20m

C$ 366

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 19/11

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

Nonstop4h 40m

Toronto Pearson Intl

Fri 21/11

4:45 p.m.-7:17 p.m.

Nonstop5h 32m

C$ 366

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 11/1

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

Nonstop4h 40m

Toronto Pearson Intl

Sat 17/1

4:45 p.m.-7:21 p.m.

Nonstop5h 36m

C$ 366

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 15/2

8:00 a.m.-3:35 p.m.

Nonstop4h 35m

Toronto Pearson Intl

Tue 17/2

4:45 p.m.-7:05 p.m.

Nonstop5h 20m

C$ 366

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 10/3

8:00 a.m.-3:35 p.m.

Nonstop4h 35m

Toronto Pearson Intl

Wed 11/3

4:45 p.m.-7:05 p.m.

Nonstop5h 20m

C$ 382

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 6/12

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

Nonstop4h 40m

C$ 141

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/10

Showing 1-10 of 21 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 24 October 2025.

The best time to book flights from Seattle to Toronto Pearson Intl Airport is 70 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, March is the cheapest month in which you can book a flight from Seattle to Toronto Pearson Intl Airport (average of C$ 169). Flying from Seattle to Toronto Pearson Intl Airport in May is currently the most expensive (average of C$ 379). 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 28 October 2025.

It’s optimal to fly from Seattle to Toronto Pearson Intl Airport in the afternoon. By choosing this option you can save up to 49% on the cost of your flight, compared to a flight in the morning.

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 28 October 2025.
Get a feel of what it's like to fly with Alaska Airlines,United Airlines, andWestJet 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
11,199 reviews
Check prices

Crew

8.5

Boarding

8.1

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,199 reviews
Alaska Airlines
8.0
Very good
11,199 reviews
Check prices

Crew

8.5

Boarding

8.1

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
8,996 reviews
Alaska Airlines
8.0
Very good
11,199 reviews
Check prices

Crew

8.5

Boarding

8.1

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
WestJet
7.2
Good
3,148 reviews
Alaska Airlines
8.0
Very good
11,199 reviews
Check prices

Crew

8.5

Boarding

8.1

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Air Canada
7.1
Good
10,370 reviews
Alaska Airlines
8.0
Very good
11,199 reviews
Check prices

Crew

8.5

Boarding

8.1

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

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 4 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?

    Alaska Airlines can get you from Seattle to Toronto Pearson Intl Airport in just under 4h 40m. Your travel time will be generally consistent. There are 3306 km between Seattle and Toronto Pearson Intl Airport. Generally, flights for this route are direct.

  • 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$ 289. Additional round-trip tickets that might be worth considering are offered by Air Canada and Alaska Airlines, with the lowest prices starting at C$ 327 and C$ 373, respectively. WestJet is priced at 50% lower than the current average price of a flight leaving 3 months from now.

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

    Consider Qatar Airways (97%), Alaska Airlines (97%) or Air Tahiti Nui (96%) 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$ 155. While the most popular route (Seattle/Tacoma Intl - Toronto Pearson Intl) can be booked for C$ 319 on average, our data indicates C$ 557 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, March is the cheapest month in which you can book a flight from Seattle to Toronto Pearson Intl Airport (average of C$ 169). Flying from Seattle to Toronto Pearson Intl Airport in May is currently the most expensive (average of C$ 379). 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
Markham
Oakville
Collingwood
Vaughan
Richmond Hill
Burlington
Barrie
Milton
Kitchener
Muskoka
Waterloo
Cambridge
Pickering
Lindsay
Peterborough
Oshawa
St. Catharines
Brantford
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.
Portland to Pearson Intl flights
Seattle to Hamilton flights
Seattle to Region of Waterloo Intl flights
Spokane to Pearson Intl flights
Bellingham to Pearson Intl flights
Pasco to Pearson Intl flights

Top 4 airlines flying from Seattle to Pearson Intl

Discover the top 4 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 28 October 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 289AverageC$ 395FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 327AverageC$ 569FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Alaska AirlinesCheapestC$ 373AverageC$ 759FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
United AirlinesCheapestC$ 486AverageC$ 546FlexibilityNo cancel feeOn-time69%
Search United Airlines 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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