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$146+ Cheap flights from Pearson Intl (YYZ) to Seattle (SEA)

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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
Apr 10 — Apr 171
Fri 4/10
Fri 4/17
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Toronto Pearson Intl to Seattle/Tacoma Intl are usually found in February or January, booked 86 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

Cheap flight deals from Pearson Intl to Seattle

Cheapest flights from Pearson Intl to Seattle
Explore the most affordable flight options available from Pearson Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 11, 2026.

This Alaska Airlines deal was found by Cheapflights users on 3/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/94:55 pm
YYZ
-
SEA
Nonstop5h 30m
Alaska Airlines
Sun 5/107:55 am
SEA
-
YYZ
Nonstop4h 50m
Alaska Airlines
Deal found 3/7$232
This SmartFares deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:30 pm
YYZ
-
SEA
Nonstop5h 23m
Air Canada
Thu 4/3010:20 am
SEA
-
YYZ
1 stop8h 48m
Air Canada
Deal found 3/9$233
This Booking.com deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/57:30 pm
YYZ
-
SEA
Nonstop5h 23m
Air Canada
Tue 4/143:40 pm
SEA
-
YYZ
2 stops10h 49m
Air Canada
Deal found 3/8$244
This Air Canada deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:15 am
YYZ
-
SEA
2 stops11h 50m
Air Canada
Tue 5/128:00 am
SEA
-
YYZ
Nonstop4h 50m
Air Canada
Deal found 3/8$247
This Air Canada deal was found by Cheapflights users on 3/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/42:15 pm
YYZ
-
SEA
2 stops11h 38m
Air Canada
Tue 5/57:20 pm
SEA
-
YYZ
2 stops9h 50m
Air Canada
Deal found 3/7$255
This Trip.com deal was found by Cheapflights users on 3/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/47:30 pm
YYZ
-
SEA
Nonstop5h 23m
Air Canada
Mon 4/138:00 pm
SEA
-
YYZ
1 stop14h 05m
Air Canada
Deal found 3/9$256
This Air Canada deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:15 am
YYZ
-
SEA
2 stops11h 50m
Air Canada
Wed 5/205:40 am
SEA
-
YYZ
2 stops10h 47m
Air Canada
Deal found 3/8$258
This flugladen.de deal was found by Cheapflights users on 3/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/57:45 am
YYZ
-
SEA
1 stop9h 34m
Multiple Airlines
Tue 4/143:40 pm
SEA
-
YYZ
2 stops10h 49m
Multiple Airlines
Deal found 3/8$260

Find flight deals from Pearson Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Pearson Intl (YYZ) to Seattle (SEA). 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 March 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$232
(Alaska Airlines)

One-way from

$146
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$295

Good round-trip deal

$332 or less

Good one-way deal

$187 or less
Provider with most accurate pricing for Toronto Pearson Intl-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Toronto Pearson Intl-Seattle/Tacoma Intl flights.
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From Toronto Pearson Intl to Seattle/Tacoma Intl
Search Deals
One-way flight from Toronto Pearson Intl to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Toronto Pearson Intl to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Toronto Pearson Intl to Seattle/Tacoma Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Pearson Intl to Seattle 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 2,558,603 searches. Data last updated March 11, 2026.
Use the filters below to find and compare flights from Toronto Pearson Intl Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 4/21

10:45 am-11:27 pm

2 stops15h 42m

Seattle/Tacoma Intl

Tue 4/28

11:59 pm-9:54 am

1 stop6h 55m

$263

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 4/7

10:45 am-8:57 pm

2 stops13h 12m

Seattle/Tacoma Intl

Tue 4/14

8:55 am-11:59 pm

2 stops12h 04m

$264

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 5/7

6:30 am-2:36 pm

1 stop11h 06m

Seattle/Tacoma Intl

Sat 5/16

5:02 am-9:32 pm

1 stop13h 30m

$270

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 4/24

1:00 pm-7:00 pm

1 stop9h 00m

Seattle/Tacoma Intl

Sun 4/26

11:59 pm-11:49 am

1 stop8h 50m

$271

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 4/22

1:00 pm-7:00 pm

1 stop9h 00m

Seattle/Tacoma Intl

Thu 4/23

10:35 pm-11:49 am

1 stop10h 14m

$272

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 5/6

10:15 am-7:00 pm

1 stop11h 45m

Seattle/Tacoma Intl

Sat 5/9

11:53 pm-9:54 am

1 stop7h 01m

$272

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 5/5

8:50 am-7:00 pm

1 stop13h 10m

Seattle/Tacoma Intl

Wed 5/13

10:53 pm-11:49 am

1 stop9h 56m

$272

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 5/22

4:18 pm-8:00 am

1 stop18h 42m

Seattle/Tacoma Intl

Mon 5/25

5:00 am-9:32 pm

1 stop13h 32m

$277

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Mon 4/6

12:15 pm-6:26 pm

1 stop9h 11m

Seattle/Tacoma Intl

Mon 4/13

11:59 pm-11:31 am

1 stop8h 32m

$280
Quickest round-trip

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 4/5

7:00 am-11:48 am

1 stop7h 48m

Seattle/Tacoma Intl

Wed 4/8

7:00 am-7:37 pm

1 stop9h 37m

$313

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/6

Showing 1-10 of 22 resultsSorted by cheapest first
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Compare providers for flights from Pearson Intl to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Pearson Intl to Seattle in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
SmartFaresPrice Accuracy1 starTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Toronto Pearson Intl Airport-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Toronto Pearson Intl Airport-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Toronto Pearson Intl Airport-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Toronto Pearson Intl Airport-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Toronto Pearson Intl Airport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Pearson Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Pearson Intl 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 Toronto Pearson Intl Airport to Seattle

How far ahead should I book a flight from Toronto Pearson Intl Airport to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Pearson Intl to Seattle. Price data was last updated on March 6, 2026.

To ensure you get the cheapest price possible for a flight from Toronto Pearson Intl Airport to Seattle, you should look to book at least 86 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Toronto Pearson Intl Airport to Seattle?

Currently, December is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of $131). Flying from Toronto Pearson Intl Airport to Seattle in July is currently the most expensive (average of $236). 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 YYZ to SEA?

Find hourly flight availability from Pearson Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 11, 2026.

When flying from Toronto Pearson Intl Airport to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

The best insider tips for Toronto Pearson Intl Airport to Seattle flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Toronto Pearson Intl Airport to Seattle trip
Our travel experts
Robert Schrader

Robert Schrader

Expert on Alaska Airlines

One of the web's original travel bloggers, Robert launched his first site Leave Your Daily Hell in 2009. Since then, he's expanded into destination niche sites (one each for Japan, Thailand and Taiwan), in addition to having written for the inflight magazines of Singapore Airlines and Korean Air. Overall, he's visited nearly 100 countries, and flies business as often as possible.

Read more
Jessica Macdonald

Jessica Macdonald

Expert on Air Canada

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Read more
Kaitlyn McInnis

Kaitlyn McInnis

Expert on YYZ

Kaitlyn is a guidebook author and travel writer splitting her time between Atlantic Canada and Istanbul, Türkiye. She has visited over fifty countries and all seven continents, so she is very familiar with many hotels, airports and airlines around the globe. But her favorite type of vacation is sunbathing by the sea with a good book in hand.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated March 11, 2026.
See what other customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Toronto Pearson Intl Airport to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
12,027 reviews

Crew

8.5

Food

7.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Alaska Airlines
8.0
Very good
12,027 reviews
Alaska Airlines
8.0
Very good
12,027 reviews

Crew

8.5

Food

7.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Delta
7.9
Good
8,284 reviews
Alaska Airlines
8.0
Very good
12,027 reviews

Crew

8.5

Food

7.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
United Airlines
7.4
Good
9,415 reviews
Alaska Airlines
8.0
Very good
12,027 reviews

Crew

8.5

Food

7.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
WestJet
7.2
Good
3,291 reviews
Alaska Airlines
8.0
Very good
12,027 reviews

Crew

8.5

Food

7.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Air Canada
7.1
Good
10,800 reviews
Alaska Airlines
8.0
Very good
12,027 reviews

Crew

8.5

Food

7.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Related info for your journey

Find useful and relevant information for your journey from Pearson Intl to Seattle. 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 into for flights to Seattle from Toronto Pearson Intl?

    For a flight from Toronto Pearson Intl to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 3 inbound flights from Toronto Pearson Intl per day. 6 airlines have flights to Seattle/Tacoma Intl from Toronto Pearson Intl on a regular basis.

  • How long is the flight from Toronto Pearson Intl Airport to Seattle?

    Departing from Toronto Pearson Intl Airport to Seattle will take you 11h 06m. The distance from Toronto Pearson Intl Airport to Seattle is about 2054 mi.

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

    According to our current data, WestJet ($192), Alaska Airlines ($202), and Air Canada ($209) offers the cheapest pricing from Toronto Pearson Intl Airport to Seattle. You may be able to fly from Toronto Pearson Intl Airport to Seattle for 42% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Toronto Pearson Intl Airport to Seattle one-way?

    $121 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Alaska Airlines and WestJet, with prices starting from $128 and $138, respectively.

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

    Before booking your flight to Seattle from Toronto Pearson Intl Airport, check out the most reliable airlines to get you to your destination on time: Qatar Airways (72%), Alaska Airlines (72%), Hawaiian Airlines( 72%).

  • What are the cheapest flights from Toronto Pearson Intl Airport to Seattle?

    Looking for the cheapest flight from Toronto Pearson Intl Airport to Seattle? While on average our users pay $336, our data indicates the cheapest price to be $141. The most popular route (Toronto Pearson Intl - Seattle/Tacoma Intl), is priced around $264.

  • Can I find deals for flights from Pearson Intl to Seattle that include hotel bookings?

    Yes. In addition to deals on Pearson Intl to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Pearson Intl to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Pearson Intl to Seattle.

  • Can I find deals for business class flights from Pearson Intl to Seattle?

    Yes. Cheapflights offers flight deals from Pearson Intl to Seattle 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 Toronto Pearson Intl Airport to Seattle?

    Currently, December is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of $131). Flying from Toronto Pearson Intl Airport to Seattle in July is currently the most expensive (average of $236). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Kent
Lynnwood
Edmonds
Lacey
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

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Alternative routes for Pearson Intl to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Pearson Intl to Seattle

Discover the top 6 airlines that operate flights from Pearson Intl to Seattle. 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 2,558,603 searches. Data last updated March 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$192Average$274FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$202Average$381FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$209Average$401FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$238Average$446FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$277Average$277FlexibilityNo cancel feeOn-time71%
DeltaCheapest$289Average$356FlexibilityNo cancel feeOn-timeN/A

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