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Cheap flights from Seattle to Toronto Pearson Intl Airport from C$ 142

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 25/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
11 Jan — 18 Jan1
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 October, booked 82 days in advance, depart on a Wednesday or Tuesday 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 12 December 2025.

Wed 31/128:10 a.m.SEA - YYZ
Nonstop4h 43mAir Canada
Wed 7/17:50 p.m.YYZ - SEA
Nonstop5h 26mAir Canada
Deal found 10/12C$ 348
Wed 31/125:02 a.m.SEA - YYZ
1 stop14h 39mUnited Airlines
Wed 7/17:50 p.m.YYZ - SEA
Nonstop5h 26mUnited Airlines
Deal found 10/12C$ 479
Wed 31/128:00 a.m.SEA - YYZ
Nonstop4h 35mMultiple Airlines
Mon 5/110:15 p.m.YYZ - SEA
2 stops38h 38mMultiple Airlines
Deal found 10/12C$ 512
Wed 31/128:10 a.m.SEA - YYZ
Nonstop4h 43mAir Canada
Mon 5/16:45 p.m.YYZ - SEA
1 stop17h 30mAir Canada
Deal found 10/12C$ 519
Wed 31/123:50 p.m.SEA - YYZ
2 stops14h 46mUnited Airlines
Mon 5/19:00 a.m.YYZ - SEA
1 stop12h 46mUnited Airlines
Deal found 10/12C$ 557
Sat 27/127:00 a.m.SEA - YYZ
1 stop13h 59mUnited Airlines
Tue 6/19:00 p.m.YYZ - SEA
1 stop17h 32mUnited Airlines
Deal found 10/12C$ 596
Sat 27/128:00 p.m.SEA - YYZ
1 stop6h 59mAir Canada
Tue 6/18:55 p.m.YYZ - SEA
2 stops15h 20mAir Canada
Deal found 10/12C$ 621
Mon 29/127:00 a.m.SEA - YYZ
1 stop11h 21mUnited Airlines
Mon 5/19:00 a.m.YYZ - SEA
1 stop12h 46mUnited Airlines
Deal found 9/12C$ 685

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 12 December 2025.

Round-trip from

C$ 346

One-way from

C$ 142

Popular in

December

Cheapest in

January

Average price

C$ 822

Good round-trip deal

C$ 375 or less

Good one-way deal

C$ 267 or less
Air Canada
  • Air Canada
  • 17/1-20/1
  • Nonstop
  • 10h 09m total
  • Seattle to Toronto
Search Deals
Air Canada
  • Air Canada
  • 25/1
  • 1 total stop
  • 7h 15m total
  • Seattle to Toronto
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 42 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 12 December 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

Fri 30/1

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

Nonstop4h 40m

Toronto Pearson Intl

Sun 1/2

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

Nonstop5h 32m

C$ 350

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 12/2

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

Nonstop4h 40m

Toronto Pearson Intl

Sat 7/3

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

Nonstop5h 33m

C$ 361

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 5/3

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

Nonstop4h 40m

Toronto Pearson Intl

Mon 9/3

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

Nonstop5h 33m

C$ 376

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 6/3

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

Nonstop4h 40m

Toronto Pearson Intl

Mon 9/3

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

Nonstop5h 33m

C$ 376

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 12/3

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

Nonstop4h 40m

Toronto Pearson Intl

Sun 15/3

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

Nonstop5h 33m

C$ 376

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 24/1

6:48 a.m.-10:37 p.m.

1 stop12h 49m

Toronto Pearson Intl

Sat 31/1

9:00 a.m.-6:14 p.m.

1 stop12h 14m

C$ 381

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 20/1

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

1 stop7h 02m

Toronto Pearson Intl

Tue 27/1

2:57 p.m.-11:15 p.m.

1 stop11h 18m

C$ 388

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 7/1

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

1 stop7h 02m

Toronto Pearson Intl

Wed 14/1

11:00 a.m.-9:12 p.m.

2 stops13h 12m

C$ 394

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 21/1

11:45 p.m.-11:48 a.m.

1 stop9h 03m

Toronto Pearson Intl

Sat 24/1

11:00 a.m.-9:15 p.m.

2 stops13h 15m

C$ 394

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 10/1

7:00 a.m.-9:21 p.m.

1 stop11h 21m

C$ 152

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 17 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 5 December 2025.

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, March is the cheapest month in which you can book a flight from Seattle to Toronto Pearson Intl Airport (average of C$ 167). Flying from Seattle to Toronto Pearson Intl Airport in May is currently the most expensive (average of C$ 375). 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 12 December 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 40% on the cost of your flight, compared to a flight at noon.

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 12 December 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
11,432 reviews
Check prices

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Overall

8.0

Boarding

8.1

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
11,432 reviews
Alaska Airlines
8.0
Very good
11,432 reviews
Check prices

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Overall

8.0

Boarding

8.1

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
9,095 reviews
Alaska Airlines
8.0
Very good
11,432 reviews
Check prices

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Overall

8.0

Boarding

8.1

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
3,195 reviews
Alaska Airlines
8.0
Very good
11,432 reviews
Check prices

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Overall

8.0

Boarding

8.1

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
10,517 reviews
Alaska Airlines
8.0
Very good
11,432 reviews
Check prices

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

Overall

8.0

Boarding

8.1

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 5 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 United Airlines is currently your cheapest option to Toronto Pearson Intl Airport, with prices starting at C$ 190. Additional round-trip tickets that might be worth considering are offered by WestJet and Air Canada, with the lowest prices starting at C$ 285 and C$ 322, respectively. United Airlines is priced at 66% 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$ 147 on WestJet. Other airlines that offer cheap prices include Alaska Airlines from C$ 153 and Air Canada from C$ 162 one-way.

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

    Consider Alaska Airlines (96%), Qatar Airways (96%) or Hawaiian Airlines (94%) 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$ 137. While the most popular route (Seattle/Tacoma Intl - Toronto Pearson Intl) can be booked for C$ 298 on average, our data indicates C$ 654 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$ 167). Flying from Seattle to Toronto Pearson Intl Airport in May is currently the most expensive (average of C$ 375). 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
Kitchener
Burlington
Richmond Hill
Barrie
Milton
Muskoka
Cambridge
Waterloo
Guelph
Lindsay
Pickering
Peterborough
Oshawa
St. Catharines
Brantford

Browse thousands of different options on Cheapflights for your next trip

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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
Bellingham to Pearson Intl flights
Seattle to Region of Waterloo Intl flights
Spokane 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 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 285AverageC$ 389FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 364AverageC$ 461FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Alaska AirlinesCheapestC$ 375AverageC$ 783FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
United AirlinesCheapestC$ 487AverageC$ 538FlexibilityNo 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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