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Cheap flights from Seattle to Toronto Pearson Intl Airport from C$ 161

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 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
3 Aug — 10 Aug1
1 adult

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 Thursday 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 29 July 2025.

Round-trip from

C$ 333

One-way from

C$ 161

Popular in

June

Cheapest in

January

Average price

C$ 682

Good round-trip deal

C$ 910 or less

Good one-way deal

C$ 235 or less
WestJet
  • WestJet
  • 12/9-19/9
  • 3 total stops
  • 19h 45m total
  • Seattle to Toronto
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WestJet
  • WestJet
  • 26/8
  • 1 total stop
  • 7h 37m total
  • Seattle to Toronto
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Highest demand for flights based on searches. 10% potential increase in price (C$ 97 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 July 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 29 July 2025.

Fri 12/91:15 p.m.SEA - YYZ
1 stop8h 16mWestJet
Fri 19/912:00 p.m.YYZ - SEA
2 stops11h 29mWestJet
Deal found 29/7C$ 333
Wed 12/118:15 a.m.SEA - YYZ
Nonstop4h 43mAir Canada
Wed 26/117:30 p.m.YYZ - SEA
Nonstop5h 26mAir Canada
Deal found 29/7C$ 351
Fri 12/97:16 a.m.SEA - YYZ
Nonstop4h 44mMultiple Airlines
Fri 19/93:00 p.m.YYZ - SEA
1 stop8h 29mMultiple Airlines
Deal found 29/7C$ 402
Tue 9/97:16 a.m.SEA - YYZ
Nonstop4h 44mAlaska Airlines
Sat 20/94:45 p.m.YYZ - SEA
Nonstop5h 23mAlaska Airlines
Deal found 28/7C$ 405

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 29 July 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 12/9

1:15 p.m.-12:31 a.m.

1 stop8h 16m

Toronto Pearson Intl

Fri 19/9

12:00 p.m.-8:29 p.m.

2 stops11h 29m

C$ 333

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 12/11

8:15 a.m.-3:58 p.m.

Nonstop4h 43m

Toronto Pearson Intl

Wed 26/11

7:30 p.m.-9:56 p.m.

Nonstop5h 26m

C$ 351

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 10/9

7:16 a.m.-3:00 p.m.

Nonstop4h 44m

Toronto Pearson Intl

Wed 17/9

8:40 a.m.-10:59 a.m.

Nonstop5h 19m

C$ 362

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/9

7:16 a.m.-3:00 p.m.

Nonstop4h 44m

Toronto Pearson Intl

Sat 20/9

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

Nonstop5h 23m

C$ 405

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 26/8

7:35 p.m.-6:12 a.m.

1 stop7h 37m

C$ 161

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 7/9

7:16 a.m.-3:00 p.m.

Nonstop4h 44m

C$ 167

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 25/11

7:13 p.m.-9:36 a.m.

2 stops11h 23m

C$ 169

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 7/9

7:15 p.m.-6:01 a.m.

1 stop7h 46m

C$ 180

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 2/9

6:50 p.m.-8:52 p.m.

2 stops23h 02m

C$ 193

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sat 30/8

9:45 p.m.-12:10 p.m.

1 stop11h 25m

C$ 196

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/7

Showing 1-10 of 11 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 25 July 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$ 167). 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 29 July 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 73% on the cost of your flight, compared to a flight in the morning.

Weekly flight availability from Seattle to Toronto Pearson Intl Airport

Explore weekly flight availability from Seattle to Pearson Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 29 July 2025.

The most flights from SEA to YYZ are scheduled on a Tuesday (7 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (4 on average).

What’s the top layover airport for flights from Seattle to Toronto Pearson Intl Airport?

Share of one-stop round-trip flights from Seattle to Toronto Pearson Intl Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

Calgary (YYC) – chosen by Cheapflights users on 40% of one-stop itineraries from Seattle to Toronto Pearson Intl Airport on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to Toronto Pearson Intl Airport?

Average round-trip fare for 1-stop flights from Seattle to Toronto Pearson Intl Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Chicago (ORD) is the most affordable 1-stop option, with an average round-trip price of C$ 476.

What’s the fastest layover option from Seattle to Toronto Pearson Intl Airport?

Shortest average travel time for 1-stop one-way flights from Seattle to Toronto Pearson Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 3h 06m.

Which airport typically offers the quickest layover for flights from Seattle to Toronto Pearson Intl Airport?

Average layover duration for 1-stop one-way flights from Seattle to Toronto Pearson Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 2h 58m.

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 29 July 2025.
Get a feel of what it's like to fly with Alaska Airlines,Delta, andUnited Airlines 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

Overall

8.0

Boarding

8.1

Entertainment

7.1

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

Overall

8.0

Boarding

8.1

Entertainment

7.1

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.
Delta
8.0
Very good
7,979 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

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
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

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.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

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
2,972 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

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 3 airlines. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

  • 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$ 333. Additional round-trip tickets that might be worth considering are offered by Air Canada and Alaska Airlines, with the lowest prices starting at C$ 351 and C$ 405, respectively. WestJet is priced at 42% 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$ 161 on WestJet. Other airlines that offer cheap prices include Alaska Airlines from C$ 167 and United Airlines from C$ 169 one-way.

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

    Consider Qatar Airways (97%), Alaska Airlines (92%) or Hawaiian Airlines (92%) 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$ 175. While the most popular route (Seattle/Tacoma Intl - Toronto Pearson Intl) can be booked for C$ 318 on average our data indicates C$ 706 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$ 167). 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
Vaughan
Collingwood
Richmond Hill
Barrie
Burlington
Milton
Muskoka
Kitchener
Pickering
Orillia
Brantford
Waterloo
St. Catharines
Cobourg
Peterborough
Cambridge
Oshawa

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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 29 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 189AverageC$ 574FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapestC$ 295AverageC$ 478FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 418AverageC$ 721FlexibilityNo cancel feeOn-time75%
Search Alaska 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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