Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Seattle to Toronto Pearson Intl Airport from C$ 259

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 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
21 Aug — 28 Aug1
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 16 days in advance, depart on a Thursday or Wednesday 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 22 July 2026.

Sun 20/910:30 a.m.
SEA
-
YYZ
2 stops8h 05m
WestJet
Wed 30/91:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 18/7C$ 532
Tue 25/810:30 a.m.
SEA
-
YYZ
1 stop9h 15m
WestJet
Mon 31/81:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 19/7C$ 534
Thu 1/1010:30 a.m.
SEA
-
YYZ
1 stop7h 45m
WestJet
Mon 12/101:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 17/7C$ 535
Sun 23/87:00 a.m.
SEA
-
YYZ
1 stop8h 55m
WestJet
Tue 8/91:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 18/7C$ 537
Mon 24/810:30 a.m.
SEA
-
YYZ
1 stop9h 15m
WestJet
Wed 2/93:50 p.m.
YYZ
-
SEA
1 stop8h 10m
WestJet
Deal found 19/7C$ 538
Sun 23/87:00 a.m.
SEA
-
YYZ
1 stop8h 55m
WestJet
Thu 27/81:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 19/7C$ 539
Tue 25/810:30 a.m.
SEA
-
YYZ
1 stop9h 15m
WestJet
Wed 2/93:50 p.m.
YYZ
-
SEA
1 stop8h 10m
WestJet
Deal found 18/7C$ 541
Sun 23/87:00 a.m.
SEA
-
YYZ
1 stop8h 55m
WestJet
Wed 2/93:50 p.m.
YYZ
-
SEA
1 stop8h 10m
WestJet
Deal found 17/7C$ 542
Mon 24/810:30 a.m.
SEA
-
YYZ
1 stop9h 15m
WestJet
Fri 4/91:30 p.m.
YYZ
-
SEA
1 stop8h 15m
WestJet
Deal found 18/7C$ 544
Wed 26/82:37 p.m.
SEA
-
YYZ
2 stops27h 13m
Multiple Airlines
Fri 4/91:30 p.m.
YYZ
-
SEA
1 stop8h 15m
Multiple Airlines
Deal found 20/7C$ 545
Wed 26/87:06 p.m.
SEA
-
YYZ
2 stops24h 39m
Multiple Airlines
Tue 8/91:30 p.m.
YYZ
-
SEA
1 stop8h 15m
Multiple Airlines
Deal found 18/7C$ 546
Mon 24/810:30 a.m.
SEA
-
YYZ
1 stop9h 15m
WestJet
Sat 29/82:50 p.m.
YYZ
-
SEA
1 stop9h 10m
WestJet
Deal found 19/7C$ 548

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 22 July 2026.

Round-trip from

C$ 532

One-way from

C$ 259

Popular in

August

Cheapest in

January

Average price

C$ 677

Good round-trip deal

C$ 911 or less

Good one-way deal

C$ 443 or less
WestJet
  • WestJet
  • 20/9-30/9
  • 3 total stops
  • 16h 20m total
  • Seattle to Toronto
Search Deals
WestJet
  • WestJet
  • 6/8
  • 1 total stop
  • 8h 20m total
  • Seattle to Toronto
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (C$ 172 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 July 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 22 July 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

Tue 25/8

9:35 a.m.-11:10 p.m.

2 stops10h 35m

Toronto Pearson Intl

Sat 29/8

6:10 a.m.-2:55 p.m.

2 stops11h 45m

C$ 739
Quickest round-trip

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 25/9

7:52 a.m.-3:45 p.m.

Nonstop4h 53m

Toronto Pearson Intl

Thu 1/10

4:55 p.m.-7:13 p.m.

Nonstop5h 18m

C$ 784

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 28/8

5:30 a.m.-5:24 p.m.

1 stop8h 54m

Toronto Pearson Intl

Tue 1/9

6:10 a.m.-12:40 p.m.

2 stops9h 30m

C$ 806

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 20/9

7:52 a.m.-3:45 p.m.

Nonstop4h 53m

Toronto Pearson Intl

Wed 30/9

4:55 p.m.-7:13 p.m.

Nonstop5h 18m

C$ 825

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Sun 27/9

7:52 a.m.-3:45 p.m.

Nonstop4h 53m

Toronto Pearson Intl

Sat 3/10

4:55 p.m.-7:26 p.m.

Nonstop5h 31m

C$ 825

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 1/10

7:52 a.m.-3:45 p.m.

Nonstop4h 53m

Toronto Pearson Intl

Fri 9/10

4:55 p.m.-7:26 p.m.

Nonstop5h 31m

C$ 839

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 6/10

8:00 a.m.-3:45 p.m.

Nonstop4h 45m

Toronto Pearson Intl

Mon 12/10

4:55 p.m.-7:26 p.m.

Nonstop5h 31m

C$ 869

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 21/9

7:52 a.m.-3:45 p.m.

Nonstop4h 53m

Toronto Pearson Intl

Tue 29/9

4:55 p.m.-7:13 p.m.

Nonstop5h 18m

C$ 869

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Mon 24/8

11:59 p.m.-2:24 p.m.

1 stop11h 25m

Toronto Pearson Intl

Sun 30/8

4:18 p.m.-11:04 p.m.

1 stop9h 46m

C$ 920

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 24/12

7:55 a.m.-3:39 p.m.

Nonstop4h 44m

Toronto Pearson Intl

Fri 1/1

4:45 p.m.-7:13 p.m.

Nonstop5h 28m

C$ 927

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/7

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

The best time to book flights from Seattle to Toronto Pearson Intl Airport is 15 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$ 373). Flying from Seattle to Toronto Pearson Intl Airport in August is currently the most expensive (average of C$ 701). 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 22 July 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.

How much does it cost to fly round-trip from Seattle to Toronto Pearson Intl Airport?

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 22 July 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
7.9
Good
12,688 reviews
Check prices

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Alaska Airlines
7.9
Good
12,688 reviews
Alaska Airlines
7.9
Good
12,688 reviews
Check prices

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
WestJet
7.2
Good
3,411 reviews
Alaska Airlines
7.9
Good
12,688 reviews
Check prices

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Air Canada
7.1
Good
11,371 reviews
Alaska Airlines
7.9
Good
12,688 reviews
Check prices

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Crew

8.5

Food

7.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle

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 4 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?

    Delta and Alaska Airlines can get you from Seattle to Toronto Pearson Intl Airport in just under 4h 53m. Your travel time can differ by up to 5h 42m. There are 3306 km between Seattle and Toronto Pearson Intl Airport. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from Seattle to Toronto Pearson Intl Airport round-trip?

    Flying on Alaska Airlines is currently your cheapest option to Toronto Pearson Intl Airport, with prices starting at C$ 287. Additional round-trip tickets that might be worth considering are offered by WestJet and Air Canada, with the lowest prices starting at C$ 291 and C$ 372, respectively. Alaska Airlines is priced at 48% 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$ 130 on Alaska Airlines. Other airlines that offer cheap prices include Air Canada from C$ 140 and WestJet from C$ 146 one-way.

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

    Consider Air Canada (97%), United Airlines (97%) or Brussels 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$ 385. While the most popular route (Seattle/Tacoma Intl - Toronto Pearson Intl) can be booked for C$ 549 on average, our data indicates C$ 871 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$ 373). Flying from Seattle to Toronto Pearson Intl Airport in August is currently the most expensive (average of C$ 701). 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
Kitchener
Collingwood
Vaughan
Oakville
Barrie
Oshawa
Burlington
Muskoka
Guelph
Cambridge
Richmond Hill
Pickering
Waterloo
Brantford
Milton
Owen Sound
Whitby
Cobourg

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 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 22 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapestC$ 287AverageC$ 787FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
WestJetCheapestC$ 291AverageC$ 429FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 372AverageC$ 548FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.