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$152+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Find cheap flights from Pearson Intl to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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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 Wednesday or Friday 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 December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:00 amYYZ - SEA
1 stop13h 57mUnited Airlines
Wed 1/78:40 amSEA - YYZ
2 stops12h 19mUnited Airlines
Deal found 12/10$352
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:40 pmYYZ - SEA
2 stops17h 15mUnited Airlines
Sun 2/1511:35 pmSEA - YYZ
1 stop9h 13mUnited Airlines
Deal found 12/10$371
This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:30 amYYZ - SEA
1 stop17h 37mUnited Airlines
Wed 1/72:10 pmSEA - YYZ
1 stop16h 48mUnited Airlines
Deal found 12/11$397
This United Airlines deal was found by Cheapflights users on 12/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2510:00 amYYZ - SEA
1 stop13h 57mUnited Airlines
Thu 1/111:59 pmSEA - YYZ
1 stop6h 59mUnited Airlines
Deal found 12/9$398
This United Airlines deal was found by Cheapflights users on 12/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:30 amYYZ - SEA
1 stop12h 36mUnited Airlines
Tue 1/69:00 amSEA - YYZ
2 stops22h 40mUnited Airlines
Deal found 12/9$413
This SmartFares deal was found by Cheapflights users on 12/11. 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.
Mon 12/224:45 pmYYZ - SEA
Nonstop5h 26mAlaska Airlines
Thu 1/157:55 amSEA - YYZ
Nonstop4h 40mAlaska Airlines
Deal found 12/11$433
This United Airlines deal was found by Cheapflights users on 12/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:30 amYYZ - SEA
1 stop15h 15mUnited Airlines
Thu 1/111:59 pmSEA - YYZ
1 stop6h 59mUnited Airlines
Deal found 12/9$442
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2910:45 amYYZ - SEA
1 stop13h 22mUnited Airlines
Wed 12/315:02 amSEA - YYZ
1 stop14h 39mUnited Airlines
Deal found 12/10$456

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 December 12, 2025.

Most accurate provider

OneTravel
3 stars

Most trusted provider

OneTravel
3 stars

Round-trip from

$199
(FlightHub)

One-way from

$152
(Air Canada)

Popular in

July

Cheapest in

February

Average price

$367

Good round-trip deal

$380 or less

Good one-way deal

$163 or less
Provider with most accurate pricing for Toronto Pearson Intl-Seattle/Tacoma Intl flight deals.
Search Deals
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. 16% potential increase in price ($70 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 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 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 December 12, 2025.
Use the filters below to find and compare flights from Toronto Pearson Intl Airport to Seattle that are best for you.

Fly from

Pearson Intl

Fly to

Seattle

Route

Depart

Return

Price

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 3/14

4:45 pm-7:18 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Tue 3/17

7:55 am-3:35 pm

Nonstop4h 40m

$210

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 1/16

8:45 pm-10:22 am

1 stop16h 37m

Seattle/Tacoma Intl

Fri 1/23

3:10 pm-5:58 am

2 stops11h 48m

$214

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 1/21

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Sun 2/1

7:55 am-3:35 pm

Nonstop4h 40m

$218

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 1/28

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Thu 2/5

7:55 am-3:35 pm

Nonstop4h 40m

$219

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sun 1/25

7:50 pm-10:16 pm

Nonstop5h 26m

Seattle/Tacoma Intl

Sun 2/1

8:10 am-3:53 pm

Nonstop4h 43m

$220

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Thu 1/15

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Sun 1/18

7:55 am-3:35 pm

Nonstop4h 40m

$227

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 1/30

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Mon 2/2

7:55 am-3:35 pm

Nonstop4h 40m

$227

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Fri 1/30

4:45 pm-7:17 pm

Nonstop5h 32m

Seattle/Tacoma Intl

Sun 2/1

7:55 am-3:35 pm

Nonstop4h 40m

$227

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Sat 1/24

6:50 am-6:28 pm

2 stops14h 38m

Seattle/Tacoma Intl

Sat 1/31

11:45 pm-11:48 am

1 stop9h 03m

$242

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 1/7

10:00 am-9:15 pm

2 stops14h 15m

Seattle/Tacoma Intl

Wed 1/14

7:00 am-11:59 pm

1 stop13h 59m

$242

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 21 results
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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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
SmartFaresPrice Accuracy1 starTrust Score*1 star
OneTravelPrice 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 OneTravel to be most consistent on Cheapflights vs. OneTravel Users can find the same prices on Toronto Pearson Intl Airport-Seattle flight deals on Cheapflights vs. OneTravel >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 OneTravel the most. OneTravel 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 December 5, 2025.

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 June is currently the most expensive (average of $249). 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 December 12, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 50% on flights from Toronto Pearson Intl Airport to Seattle by exploring options for tickets in the evening.

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
Airlines
Alaska Airlines

Alaska Airlines offers flat-fee Wi-Fi, great for business travelers on longer flights.


Alaska's Premium Class offers extra legroom and free cocktails, enhancing comfort on medium-haul flights.

Read more about Alaska AirlinesBy Robert Schrader
Air Canada

Air Canada offers high-speed Wi-Fi on most flights, book in advance for best rates.


Economy Latitude includes priority check-in and two checked bags, ideal for business travelers.

Read more about Air CanadaBy Jessica Macdonald
Airports
YYZ

Toronto Pearson offers unlimited free Wi-Fi throughout the airport, making it easy to stay connected on multiple devices without hassle.

Read more about YYZBy Kaitlyn McInnis
SEA

Use the Link light rail from SEA to downtown Seattle. It's inexpensive, runs every 10 minutes, and takes less than 40 minutes.

Read more about SEABy Brandon Schultz
Our travel experts
Robert Schrader

Robert Schrader

Expert on Alaska Airlines

Robert Schrader

Robert Schrader

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

Jessica Macdonald

Jessica Macdonald

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 McInnis

Kaitlyn McInnis

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

Brandon Schultz

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 December 12, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and United 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
11,429 reviews

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

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
11,429 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

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
8,009 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

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
9,095 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

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
3,194 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

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
10,514 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Overall

8.0

Food

7.1

Comfort

7.8

Crew

8.5

Entertainment

7.0

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 6 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 5h 26m. The distance from Toronto Pearson Intl Airport to Seattle is about 2054 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, WestJet ($192), Air Canada ($219), and Alaska Airlines ($225) 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 45% 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?

    $137 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Alaska Airlines and Air Canada, with prices starting from $146 and $147, 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: Hawaiian Airlines (84%), Air Tahiti Nui (84%), Qatar Airways( 78%).

  • 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 $602, our data indicates the cheapest price to be $136. The most popular route (Toronto Pearson Intl - Seattle/Tacoma Intl), is priced around $207.

  • 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 June is currently the most expensive (average of $249). 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
Olympia
Ocean Shores
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Tukwila
Kent
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

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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.
Pearson Intl to Portland flights
Region of Waterloo Intl to Seattle flights
Toronto Island to Portland flights
Hamilton to Portland flights
Pearson Intl to Spokane flights

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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$192Average$277FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$225Average$410FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$238Average$426FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$240Average$460FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$277Average$277FlexibilityNo cancel feeOn-time71%
DeltaCheapest$289Average$371FlexibilityNo cancel feeOn-timeN/A

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