SEA - YYZ

C$ 127 Find Cheap Flights from Seattle to Toronto Pearson Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Pearson Intl departing on 25/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Toronto Pearson Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Toronto, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Toronto, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Seattle to Pearson Intl (SEA-YYZ)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Pearson Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Pearson Intl

Sat, 2 Aug - Wed, 6 Aug
WestJet Logo
4:50 p.m. - 5:51 a.m.SEA-YYZ
10h 01m2 stops
WestJet Logo
8:00 a.m. - 12:58 p.m.YYZ-SEA
7h 58m1 stop
C$ 304WestJet
Find Deal
Mon, 28 Jul - Thu, 7 Aug
WestJet Logo
2:05 p.m. - 5:51 a.m.SEA-YYZ
12h 46m2 stops
WestJet Logo
1:30 p.m. - 7:14 p.m.YYZ-SEA
8h 44m1 stop
C$ 305WestJet
Find Deal
Thu, 27 Nov - Fri, 28 Nov
United Airlines Logo
11:50 p.m. - 2:01 p.m.SEA-YYZ
11h 11m1 stop
United Airlines Logo
5:55 p.m. - 12:59 a.m.YYZ-SEA
10h 04m1 stop
C$ 379United Airlines
Find Deal
Tue, 15 Jul - Wed, 16 Jul
Alaska Airlines Logo
7:17 a.m. - 3:00 p.m.SEA-YYZ
4h 43mdirect
Alaska Airlines Logo
4:45 p.m. - 7:09 p.m.YYZ-SEA
5h 24mdirect
C$ 391Alaska Airlines
Find Deal
Fri, 7 Nov - Fri, 14 Nov
United Airlines Logo
6:20 a.m. - 5:54 p.m.SEA-YYZ
8h 34m1 stop
United Airlines Logo
5:55 p.m. - 12:59 a.m.YYZ-SEA
10h 04m1 stop
C$ 412United Airlines
Find Deal
Sun, 27 Jul - Thu, 7 Aug
Air Canada Logo
2:55 p.m. - 6:59 a.m.SEA-YYZ
13h 04m2 stops
Air Canada Logo
6:15 a.m. - 2:16 p.m.YYZ-SEA
11h 01m2 stops
C$ 413Air Canada
Find Deal
Tue, 4 Nov - Sun, 16 Nov
Air Canada Logo
10:00 a.m. - 8:39 p.m.SEA-YYZ
7h 39m1 stop
Air Canada Logo
7:30 p.m. - 9:56 p.m.YYZ-SEA
5h 26mdirect
C$ 420Air Canada
Find Deal
Tue, 2 Sep - Mon, 8 Sep
 Logo
12:59 a.m. - 11:00 a.m.SEA-YYZ
7h 01m1 stop
 Logo
3:00 p.m. - 8:29 p.m.YYZ-SEA
8h 29m1 stop
C$ 422
Find Deal
Wed, 16 Jul - Thu, 24 Jul
 Logo
1:50 p.m. - 12:24 a.m.SEA-YYZ
7h 34m1 stop
 Logo
7:00 a.m. - 4:25 p.m.YYZ-SEA
12h 25m1 stop
C$ 436
Find Deal
Wed, 16 Jul - Fri, 18 Jul
Alaska Airlines Logo
7:17 a.m. - 3:00 p.m.SEA-YYZ
4h 43mdirect
Alaska Airlines Logo
4:45 p.m. - 7:09 p.m.YYZ-SEA
5h 24mdirect
C$ 457Alaska Airlines
Find Deal
Expert advice

Expert advice for your flight from Seattle to Pearson Intl

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-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.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Alaska Airlines

Alaska Airlines offers free texting on flights, a great perk for staying connected.


Alaska Airlines' 20-minute bag guarantee ensures quick baggage delivery or compensation.

Air Canada

Air Canada's Priority Check-in opens 4 hours before flights, ideal for early departures.


Air Canada's Wi-Fi is free for Aeroplan members, perfect for business travelers needing connectivity.

Read more about Air Canadaby Stefanie Waldek
Airports
SEA

Use the SEA Spot Saver for expedited security screening. Book online or via the flySEA app for free access to dedicated lanes.

Read more about SEAby Harriet Baskas
YYZ

Use the ArriveCAN app to expedite customs at YYZ. It offers a special queue, often less busy than regular lines.

Read more about YYZby Mark Stachiew
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines and SEA

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Mark Stachiew

Mark Stachiew

Expert on YYZ

Mark Stachiew

Mark Stachiew

Mark Stachiew has been exploring the world and writing about it for more than 30 years. His travel stories have appeared in numerous newspapers, magazines and online publications in Canada, the United States and beyond.

Read more
Useful Info

KAYAK's insights & trends for Seattle to Pearson Intl flights

Get data-powered insights and trends into flights from Seattle to Pearson Intl to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Seattle to Toronto Pearson Airport?

The average price of all round-trip flights from Seattle to Toronto Pearson Intl Airport clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Toronto Pearson Airport on a Thursday and more expensive on a Tuesday. On your return trip to Seattle, you should consider flying back on a Thursday, and avoid Sundays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Toronto Pearson Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Toronto Pearson Intl Airport is January, where tickets cost C$ 416 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is C$ 729 and C$ 690 respectively.

Can I save money by flying with a layover from Seattle to Toronto Pearson Intl Airport?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at C$ 754 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Toronto Pearson Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Toronto Pearson Intl Airport, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.


Good to know

Low seasonJanuary
High seasonAugust
Cheapest flightC$ 127
Best time to beat the crowds (29% less expensive on average)
Most popular time to fly (17% more expensive on average)
Flight from Seattle to Toronto Pearson Airport

When to book flights from Seattle to Pearson Intl

Are your dates flexible? Find out the best times to travel from Seattle to Pearson Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Seattle to Toronto Pearson Airport flights

  • What is the cheapest flight from Seattle to Toronto Pearson Intl Airport?

    In the last 3 days, the lowest price for a flight from Seattle to Toronto Pearson Intl Airport was C$ 93 for a one-way ticket and C$ 222 for a round-trip.

  • Which airports will I be using when flying from Seattle to Toronto Pearson Airport?

    On your way to Toronto Pearson Airport, you’ll fly out from Seattle/Tacoma Intl. You’ll be landing at Toronto Pearson Intl.

  • Which airlines offer Wi-Fi service onboard planes from Seattle to Toronto Pearson Airport?

    Air Canada, Alaska Airlines, United Airlines, and Lufthansa offer inflight Wi-Fi service on the Seattle to Toronto Pearson Airport flight route.

  • Which aircraft models fly most regularly from Seattle to Toronto Pearson Airport?

    The Airbus A220-300 is the aircraft model that flies most regularly on the Seattle to Toronto Pearson Airport flight route.

  • Which airline alliances offer flights from Seattle to Toronto Pearson Airport?

    Star Alliance, and oneworld are the airline alliances operating flights between Seattle and Toronto Pearson Airport, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Seattle to Toronto Pearson Airport?

    There are direct flights from Seattle to Toronto Pearson Airport on a daily basis.

  • Which is the best airline for flights from Seattle to Toronto, Alaska Airlines or WestJet?

    The two airlines most popular with KAYAK users for flights from Seattle to Toronto are Alaska Airlines and WestJet. With an average price for the route of C$ 681 and an overall rating of 8.0, Alaska Airlines is the most popular choice. WestJet is also a great choice for the route, with an average price of C$ 490 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Seattle to Toronto Pearson Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Toronto Pearson Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Toronto Pearson Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Toronto Pearson Airport from Seattle is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Toronto Pearson Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Toronto Pearson Airport with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Toronto Pearson Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Toronto Pearson Airport from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Toronto Pearson Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 275 or less one-way and C$ 511 or less round-trip.

Prefer to fly direct from Seattle to Toronto Pearson Airport?

Find which airlines fly direct from Seattle/Tacoma Intl Airport to Toronto Pearson Intl Airport, which days they fly and book direct flights.

Direct departures

Seattle/Tacoma Intl to Toronto Pearson Intl

Monday

Air Canada,Air Tahiti Nui,Alaska Airlines, +2 more

Air Canada,Air Tahiti Nui, +3 more

Tuesday

Air Canada,Air Tahiti Nui,Alaska Airlines, +3 more

Air Canada,Air Tahiti Nui, +4 more

Wednesday

Air Canada,Air Tahiti Nui,Alaska Airlines, +3 more

Air Canada,Air Tahiti Nui, +4 more

Thursday

Air Canada,Air Tahiti Nui,Alaska Airlines, +4 more

Air Canada,Air Tahiti Nui, +5 more

Friday

Air Canada,Air Tahiti Nui,Alaska Airlines, +3 more

Air Canada,Air Tahiti Nui, +4 more

Saturday

Air Canada,Air Tahiti Nui,Alaska Airlines, +4 more

Air Canada,Air Tahiti Nui, +5 more

Sunday

Air Canada,Air Tahiti Nui,Alaska Airlines, +4 more

Air Canada,Air Tahiti Nui, +5 more

See more nonstop flights

Direct returns

Toronto Pearson Intl to Seattle/Tacoma Intl

Monday

Air Canada,Air Tahiti Nui,Alaska Airlines, +2 more

Air Canada,Air Tahiti Nui, +3 more

Tuesday

Air Canada,Air Tahiti Nui,Alaska Airlines, +3 more

Air Canada,Air Tahiti Nui, +4 more

Wednesday

Air Canada,Air Tahiti Nui,Alaska Airlines, +3 more

Air Canada,Air Tahiti Nui, +4 more

Thursday

Air Canada,Air Tahiti Nui,Alaska Airlines, +2 more

Air Canada,Air Tahiti Nui, +3 more

Friday

Air Canada,Air Tahiti Nui,Alaska Airlines, +3 more

Air Canada,Air Tahiti Nui, +4 more

Saturday

Air Canada,Air Tahiti Nui,Alaska Airlines, +2 more

Air Canada,Air Tahiti Nui, +3 more

Sunday

Air Canada,Air Tahiti Nui,Alaska Airlines, +3 more

Air Canada,Air Tahiti Nui, +4 more

See more nonstop flights
See more nonstop flights

Top 3 airlines serving from Seattle to Pearson Intl

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Toronto. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Pearson Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 10000 reviews
8.1Boarding
7.8Comfort
7.1Food
7.1Entertainment
8.5Crew
Airline reviews

We had to take the train to our next gate but had time to eat a meal. When to our next gate and asked employee about gate and got informed that gate had been changed so back on train to next gate. So thankful she was there and informed us of gate change. Because of the issue the boarding was slow but employees were there and busy helping all and keeping it organized.

10.0 ExcellentHelen, Jun 2025SEA - MCI
Read more Alaska Airlines reviews

We had to take the train to our next gate but had time to eat a meal. When to our next gate and asked employee about gate and got informed that gate had been changed so back on train to next gate. So thankful she was there and informed us of gate change. Because of the issue the boarding was slow but employees were there and busy helping all and keeping it organized.

Very pleasant and the flight felt like it went by quick

All flight entertainment is from your own device and there was an $8 charge to connect. also 1 drink and a small bag of pretzels was all that was given to us. other that that the seats were good and the flight itself was as expected.

It is very bad they do not give you money back

They lost our bag and it took them days to find it. Terrible communication and lots of lies about where it was. Their system hasn’t merged with Hawaiian yet they route people on shared flights with Hawaiian, creating an administrative nightmare.

Major flight delays, it was a 1.5-hour delay. The gate kept changing about 3 times in Seattle. very hectic and chaotic.

Booked a first class ticket and was not even offered a bottle of water…or a cracker…absolutely zero in flight service on a 1 hour flight

More leg room in back seats. Can you require people to smell good on planes? ha ha Staff was great! Plane was comfortable. I enjoyed the movies and TV. Smooth take off and landing.

The only problem was the time delay. Kudos to the counter agent in Seattle. Very helpful and gracious.

This flight was how a flight should be. The flight from Hawaii to Seattle was terrible

We didn’t make the flight due to Delta’s check in line moving too slow.

The flight was ahead of schedule. A half glass of juice and a cookie is pathetic! No entertainment possibilities. Not even a plug-in for phone or IPad if you wanted to watch a downloaded movie. Back to flying Air Canada!

The flight was ahead of schedule. A half glass of juice and a cookie is pathetic!

It was good, flight was on time, boarding was smooth and done in zones, food was good too but there was no form of entertainment. Luggage’s were intact. So an overall good flight

The staff were the friendliest I have encountered in years. Absolutely great!

Plane changed to one with no entertainment system or ability to serve hot meals

Flight was delayed 3 times. Then cancelled due to pilot being timed out. They refused hotel vouchers. Gate attendants were very rude and could not help you at all.

No access to any entertainment No food other than a cookie or pretzels even tho flight was over the supper hour Seats very close together and very little leg room Staff was very good

The cancelation of my flight from Toronto to Edmonton without any solution given to me for my next flight. Very poor connection from Toronto to Edmonton

Too squished in seats. I'm 110 lbs and 5'6....can't imagine being any bigger and flying

Flight was delayed but the real issue is how long we sat after boarding. Space very limited for an overnight flight and seatbacks didn’t recline so it was almost impossible to sleep.

The staff made sure I was comfortable, moved me to a better seat with more leg room

Somehow, my booking was under my preferred name instead of my legal name so they almost didn’t let me board the plane at LAX. This problem should have been notified to me when I was still in Toronto.

When arriving over 2 hours early to check k in at Charlotte airport I was told I would have to check my carry on ? Apparently the flight was full and may not be room. I was not given a choice and the agent was quite unpleasant about it. I am a senior amd was not comfortable me having to worry about my bag being lost vut it didn’t seem to bother him. There were lots and lots of people of all ages in line when we boarded with carryons and most larger than mine .the rest of my journey was pleasant vut this was totally unacceptable.

The layover was 6 PLUS hours and we were only given a $15.00 voucher. We missed our first activity in Quebec due to the delay.

Miserable staff as it was a late/delayed flight and crew wasn’t in the best spirits. Completely understood as neither was most of the passengers. Still unacceptable l.

It was a short flight, and no entertainment. That was not a problem for us, but there is no option for "not applicable". There was a bit of turbulence, so there was no food service.

the fact air Canada changed my flight from 850 PM to 815 AM with zero regard to the plans i made that last day, the cost i lost out on as things were non refundable amd shortening my first vacation in 7 years sickened me. when we purchase a service thats whats we expect. when we want to change the service we have to pay for that option but you do whatever you want . i called accessibility dept as i have a cpap and an implanted loop recorder first person said no problem just let security know you cant go thru scanners. then i got an email saying i had to fill out a fit to fly form . which again there was NO need to have that none. But that cost me money and time to have a doctor fill it out. then when i went to check in online i was declined i had to see a person at the airport instead. i couldnt get my boarding pass like everyone elseso here I was contacting air canada so I would have a easy travel experience and it ended up being a nightmare with more work for me, more cost and time. the flight itself was great the nightmare around it i will never subject myself to again. i tried to stick with supporting Canada but Air Canada was not worth supporting. very disappointed especially with a dept that is supposed to help disabled people not make an already challenging event not worth going thru at all.

Most courteous, helpful employees and all flights were on time.

2.5 hour delay sitting in the plane on the tarmac, you tell me how the experience was

Everything you need to know for your flight from Seattle to Pearson Intl

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