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$154+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — SEA
oct. 11 — oct. 181
sáb. 10/11
sáb. 10/18
1 adult, Economy
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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 81 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap 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 septiembre 11, 2025.

Round-trip from

$228
(Alaska Airlines)

One-way from

$154
(Trip.com)

Popular in

July

Cheapest in

February

Average price

$353

Good round-trip deal

$317 or less

Good one-way deal

$272 or less
From Toronto Pearson Intl to Seattle/Tacoma Intl
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One-way flight from Toronto Pearson Intl to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 16% potential increase in price ($70 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 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 Toronto Pearson Intl to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Toronto Pearson Intl to Seattle/Tacoma Intl.
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Find 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 septiembre 11, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/44:45 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
mar. 11/117:55 amSEA - YYZ
Nonstop4h 40mAlaska Airlines
Deal found 9/8$228
This Trip.com deal was found by Cheapflights users on 9/9. 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.
mar. 11/47:45 amYYZ - SEA
1 stop9h 35mMultiple Airlines
mié. 11/127:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Deal found 9/9$229
This Trip.com deal was found by Cheapflights users on 9/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/47:45 amYYZ - SEA
1 stop9h 35mMultiple Airlines
sáb. 11/87:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Deal found 9/10$230
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/18:00 amYYZ - SEA
2 stops9h 38mMultiple Airlines
sáb. 11/157:55 amSEA - YYZ
Nonstop4h 40mMultiple Airlines
Deal found 9/9$231
This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/63:00 pmYYZ - SEA
1 stop8h 29mWestJet
mié. 10/228:40 amSEA - YYZ
1 stop9h 12mWestJet
Deal found 9/10$232
This Air Canada deal was found by Cheapflights users on 9/9. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/18:40 amYYZ - SEA
Nonstop5h 19mAir Canada
mar. 10/710:00 amSEA - YYZ
1 stop7h 30mAir Canada
Deal found 9/9$233
This Alaska Airlines deal was found by Cheapflights users on 9/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/44:45 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
dom. 11/97:55 amSEA - YYZ
Nonstop4h 40mAlaska Airlines
Deal found 9/8$234
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/126:45 amYYZ - SEA
1 stop8h 50mMultiple Airlines
sáb. 10/187:18 amSEA - YYZ
Nonstop4h 42mMultiple Airlines
Deal found 9/9$235
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/36:30 amYYZ - SEA
1 stop10h 50mWestJet
sáb. 11/1511:55 amSEA - YYZ
2 stops8h 44mWestJet
Deal found 9/9$236
This oojo deal was found by Cheapflights users on 9/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 10/116:30 pmYYZ - SEA
2 stops21h 05mWestJet
dom. 10/198:40 amSEA - YYZ
2 stops12h 51mWestJet
Deal found 9/9$237
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/1510:40 amYYZ - SEA
1 stop12h 08mMultiple Airlines
jue. 10/231:50 pmSEA - YYZ
1 stop7h 32mMultiple Airlines
Deal found 9/9$239

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 septiembre 11, 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

mié. 11/5

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

mié. 11/12

7:55 am-3:35 pm

Nonstop4h 40m

$228

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mié. 11/5

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

mar. 11/11

7:55 am-3:35 pm

Nonstop4h 40m

$228

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mar. 11/4

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

mié. 11/12

7:55 am-3:35 pm

Nonstop4h 40m

$228

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mar. 11/4

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

vie. 11/14

7:55 am-3:35 pm

Nonstop4h 40m

$234

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mié. 11/5

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

sáb. 11/15

7:55 am-3:35 pm

Nonstop4h 40m

$234

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mié. 11/5

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

lun. 11/10

7:55 am-3:35 pm

Nonstop4h 40m

$234

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

sáb. 11/1

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

mié. 11/12

7:55 am-3:35 pm

Nonstop4h 40m

$234

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mar. 11/4

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

dom. 11/9

7:55 am-3:35 pm

Nonstop4h 40m

$234

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mar. 11/4

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

jue. 11/13

7:55 am-3:35 pm

Nonstop4h 40m

$234

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

vie. 11/7

4:45 pm-7:05 pm

Nonstop5h 20m

Seattle/Tacoma Intl

mié. 11/12

7:55 am-3:35 pm

Nonstop4h 40m

$234

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 22 results
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The best insider tips for Toronto Pearson Intl Airport to Seattle flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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

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 August 29, 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 70 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, January is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of $238). Flying from Toronto Pearson Intl Airport to Seattle in June is currently the most expensive (average of $388). 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 septiembre 11, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 52% on flights from Toronto Pearson Intl Airport to Seattle by exploring options for tickets in the evening.

What is the cheapest day to fly from Toronto Pearson Intl Airport to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Pearson Intl to Seattle. Price data was last updated on September 7, 2025.

Travelers seeking maximum savings on their Toronto Pearson Intl Airport to Seattle flight should consider departing on Saturday evenings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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

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 septiembre 11, 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
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
United Airlines
7.4
Good
8,937 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
WestJet
7.2
Good
3,091 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Air Canada
7.1
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

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 4 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 20m. The distance from Toronto Pearson Intl Airport to Seattle is about 2054 mi. Most flights are nonstop.

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

    According to our current data, WestJet ($226), United Airlines ($240), and Alaska Airlines ($243) 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 37% 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?

    $158 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $164 and $164, 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: Alaska Airlines (90%), Hawaiian Airlines (90%), Air Tahiti Nui( 86%).

  • 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 $420, our data indicates the cheapest price to be $167. The most popular route (Toronto Pearson Intl - Seattle/Tacoma Intl), is priced around $235.

  • 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, January is the cheapest month in which you can book a flight from Toronto Pearson Intl Airport to Seattle (average of $238). Flying from Toronto Pearson Intl Airport to Seattle in June is currently the most expensive (average of $388). 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
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Lacey
Renton
Olympia
Kent
Federal Way
Cle Elum
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Shoreline

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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
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Hamilton to Portland 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 septiembre 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$226Average$283FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$240Average$461FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$243Average$381FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$247Average$446FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$277Average$277FlexibilityNo cancel feeOn-time71%
DeltaCheapest$289Average$362FlexibilityNo cancel feeOn-timeN/A

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