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Cheap flights from Seattle to Toronto Pearson Intl Airport from C$ 164

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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
11 Oct — 18 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Toronto Pearson Intl are usually found in January or March, booked 70 days in advance, depart on a Wednesday or Sunday and return on a Thursday

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 11 September 2025.

Round-trip from

C$ 344

One-way from

C$ 164

Popular in

August

Cheapest in

January

Average price

C$ 578

Good round-trip deal

C$ 724 or less

Good one-way deal

C$ 299 or less
Alaska Airlines
  • Alaska Airlines
  • 18/10-25/10
  • Nonstop
  • 10h 05m total
  • Seattle to Toronto
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5/10
  • 5/10
  • 1 total stop
  • 15h 10m total
  • Seattle to Toronto
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Highest demand for flights based on searches. 8% potential increase in price (C$ 79 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 20 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Toronto Pearson Intl.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Toronto Pearson Intl.
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Find flight deals from Seattle to Pearson Intl

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 11 September 2025.

Sat 18/107:18 a.m.SEA - YYZ
Nonstop4h 42mAlaska Airlines
Sat 25/104:45 p.m.YYZ - SEA
Nonstop5h 23mAlaska Airlines
Deal found 9/9C$ 344
Thu 2/101:50 p.m.SEA - YYZ
1 stop7h 32mWestJet
Mon 13/106:30 a.m.YYZ - SEA
1 stop16h 59mWestJet
Deal found 9/9C$ 346
Fri 3/101:15 p.m.SEA - YYZ
1 stop8h 16mMultiple Airlines
Tue 21/104:45 p.m.YYZ - SEA
Nonstop5h 23mMultiple Airlines
Deal found 9/9C$ 348
Sat 11/108:40 a.m.SEA - YYZ
1 stop7h 12mWestJet
Sat 18/101:30 p.m.YYZ - SEA
1 stop8h 51mWestJet
Deal found 10/9C$ 351
Thu 25/98:40 a.m.SEA - YYZ
1 stop7h 12mWestJet
Sat 27/912:00 p.m.YYZ - SEA
2 stops10h 21mWestJet
Deal found 9/9C$ 352
Fri 12/127:55 a.m.SEA - YYZ
Nonstop4h 40mMultiple Airlines
Mon 15/127:45 a.m.YYZ - SEA
1 stop9h 35mMultiple Airlines
Deal found 9/9C$ 353
Thu 9/108:40 a.m.SEA - YYZ
1 stop24h 32mWestJet
Sun 12/106:45 a.m.YYZ - SEA
1 stop8h 50mWestJet
Deal found 9/9C$ 356
Mon 20/102:05 p.m.SEA - YYZ
1 stop7h 17mWestJet
Wed 29/107:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Deal found 11/9C$ 358
Sat 18/101:50 p.m.SEA - YYZ
1 stop7h 32mWestJet
Fri 31/107:45 a.m.YYZ - SEA
1 stop9h 35mWestJet
Deal found 11/9C$ 359
Thu 2/101:50 p.m.SEA - YYZ
1 stop7h 32mWestJet
Sun 5/106:30 p.m.YYZ - SEA
1 stop28h 59mWestJet
Deal found 9/9C$ 360
Thu 2/108:40 a.m.SEA - YYZ
1 stop7h 12mWestJet
Sat 4/1010:20 p.m.YYZ - SEA
1 stop17h 15mWestJet
Deal found 9/9C$ 362

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 11 September 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

Sun 19/10

7:18 a.m.-3:00 p.m.

Nonstop4h 42m

Toronto Pearson Intl

Sat 1/11

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

Nonstop5h 20m

C$ 363

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 14/11

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

Nonstop4h 40m

Toronto Pearson Intl

Tue 18/11

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

Nonstop5h 20m

C$ 363

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 5/11

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

Nonstop4h 40m

Toronto Pearson Intl

Sun 16/11

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

Nonstop5h 20m

C$ 377

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 7/11

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

Nonstop4h 40m

Toronto Pearson Intl

Sat 15/11

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

Nonstop5h 20m

C$ 377

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 21/11

7:57 a.m.-3:35 p.m.

Nonstop4h 38m

Toronto Pearson Intl

Mon 24/11

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

Nonstop5h 32m

C$ 378

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 7/11

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

Nonstop4h 40m

Toronto Pearson Intl

Fri 14/11

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

Nonstop5h 20m

C$ 391

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 16/10

7:18 a.m.-3:00 p.m.

Nonstop4h 42m

Toronto Pearson Intl

Thu 23/10

4:45 p.m.-7:08 p.m.

Nonstop5h 23m

C$ 391

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 12/12

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

Nonstop4h 40m

Toronto Pearson Intl

Mon 15/12

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

Nonstop5h 33m

C$ 391

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 7/11

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

Nonstop4h 40m

Toronto Pearson Intl

Mon 17/11

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

Nonstop5h 20m

C$ 391

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 12/12

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

Nonstop4h 40m

Toronto Pearson Intl

Sun 14/12

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

Nonstop5h 33m

C$ 391

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 24 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 29 August 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, January 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 July is currently the most expensive (average of C$ 258). 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 11 September 2025.

It’s optimal to fly from Seattle to Toronto Pearson Intl Airport in the evening. By choosing this option you can save up to 81% 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 11 September 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
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,937 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
WestJet
7.2
Good
3,091 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Air Canada
7.1
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Boarding

8.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 42m. 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 Air Canada is currently your cheapest option to Toronto Pearson Intl Airport, with prices starting at C$ 191. Additional round-trip tickets that might be worth considering are offered by WestJet and Alaska Airlines, with the lowest prices starting at C$ 324 and C$ 393, respectively. Air Canada is priced at 67% 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 (98%), Alaska Airlines (95%) or Hawaiian Airlines (95%) 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$ 161. While the most popular route (Seattle/Tacoma Intl - Toronto Pearson Intl) can be booked for C$ 291 on average, our data indicates C$ 727 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$ 168). Flying from Seattle to Toronto Pearson Intl Airport in July is currently the most expensive (average of C$ 258). 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
Richmond Hill
Vaughan
Burlington
Milton
Barrie
Muskoka
Pickering
Waterloo
Cambridge
Cobourg
Kitchener
Lindsay
Oshawa
Orillia
Peterborough
Brantford

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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
Pasco to Pearson Intl flights
Bellingham 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 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 191AverageC$ 529FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 324AverageC$ 483FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 393AverageC$ 776FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
United AirlinesCheapestC$ 481AverageC$ 541FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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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