SEA - YYZ

C$ 150 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 16/5. 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, 0 bags

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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Everything you should know

Cheapest round-trip
C$ 352
Typical prices: C$ 752-C$ 465
WestJet
Sat 30/5Fri 5/6
SEA - YYZ • 1 stop
Cheapest direct flights
C$ 396
Typical prices: C$ 695-C$ 470
Air Canada
Sat 9/5Sat 16/5
SEA - YYZ • Direct
Advice from real travellers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Alaska Airlines' free texting keeps you connected.
Use SEA Spot Saver for faster security at Seattle.
Expert advice
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Top airlines
Cheapest • from C$ 352 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Direct flights
You can fly direct with Air Canada and Alaska Airlines. Average duration is 4h 52m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
When to book
in advance
Our data shows that travellers who book at least 3 weeks in advance save around 52% compared to booking last minute.
Insights
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Insights
Insights
When to travel
Cheapest • 31% price drop
Most popular
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Flight Deals
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Flight 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, 30 May - Fri, 5 Jun
WestJet Logo
7:35 p.m. - 6:55 a.m.
SEA
-
YYZ
8h 20m
1 stop
WestJet Logo
12:00 p.m. - 6:45 p.m.
YYZ
-
SEA
9h 45m
1 stop
C$ 352WestJet
Tue, 5 May - Fri, 8 May
WestJet Logo
10:30 a.m. - 10:45 p.m.
SEA
-
YYZ
9h 15m
1 stop
WestJet Logo
1:30 p.m. - 6:45 p.m.
YYZ
-
SEA
8h 15m
1 stop
C$ 354WestJet
Thu, 14 May - Tue, 19 May
WestJet Logo
7:35 p.m. - 6:55 a.m.
SEA
-
YYZ
8h 20m
1 stop
WestJet Logo
12:00 p.m. - 6:45 p.m.
YYZ
-
SEA
9h 45m
1 stop
C$ 358WestJet
Fri, 5 Jun - Thu, 11 Jun
Multiple Airlines Logo
10:30 a.m. - 11:59 p.m.
SEA
-
YYZ
10h 29m
2 stops
Multiple Airlines Logo
12:30 a.m. - 10:08 a.m.
YYZ
-
SEA
12h 38m
2 stops
C$ 359Multiple Airlines
Sat, 1 Aug - Sat, 8 Aug
WestJet Logo
7:35 p.m. - 6:55 a.m.
SEA
-
YYZ
8h 20m
1 stop
WestJet Logo
12:00 p.m. - 6:45 p.m.
YYZ
-
SEA
9h 45m
1 stop
C$ 360WestJet
Fri, 31 Jul - Fri, 7 Aug
WestJet Logo
7:35 p.m. - 6:55 a.m.
SEA
-
YYZ
8h 20m
1 stop
WestJet Logo
3:50 p.m. - 9:00 p.m.
YYZ
-
SEA
8h 10m
1 stop
C$ 362WestJet
Sun, 2 Aug - Mon, 10 Aug
WestJet Logo
7:00 a.m. - 9:10 p.m.
SEA
-
YYZ
11h 10m
2 stops
WestJet Logo
12:00 p.m. - 9:00 p.m.
YYZ
-
SEA
12h 00m
2 stops
C$ 363WestJet
Mon, 29 Jun - Thu, 23 Jul
WestJet Logo
7:35 p.m. - 11:55 a.m.
SEA
-
YYZ
13h 20m
1 stop
WestJet Logo
3:50 p.m. - 9:00 p.m.
YYZ
-
SEA
8h 10m
1 stop
C$ 365WestJet
Sat, 11 Jul - Tue, 14 Jul
WestJet Logo
7:35 p.m. - 6:55 a.m.
SEA
-
YYZ
8h 20m
1 stop
WestJet Logo
1:30 p.m. - 6:45 p.m.
YYZ
-
SEA
8h 15m
1 stop
C$ 366WestJet
Tue, 14 Jul - Sun, 19 Jul
WestJet Logo
10:30 a.m. - 11:59 p.m.
SEA
-
YYZ
10h 29m
2 stops
WestJet Logo
1:30 p.m. - 6:45 p.m.
YYZ
-
SEA
8h 15m
1 stop
C$ 367WestJet
Booking Insights

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.

How much is a round-trip flight from Seattle to Toronto Pearson Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Toronto Pearson Intl Airport departing in May.

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 Wednesday and more expensive on a Monday. On your return trip to Seattle, you should consider flying back on a Thursday, and avoid Mondays 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$ 362 (return) on average. On the other hand, the most expensive months are December and August, where the average cost of round-trip tickets is C$ 665 and C$ 648 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$ 257 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 3 weeks before departure, which saves you about 52% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Expert advice

Expert advice for your flight from Seattle to Pearson Intl

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines and SEA

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.

Stefanie Waldek

Stefanie Waldek

Expert on Air Canada

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.

Mark Stachiew

Mark Stachiew

Expert on YYZ

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.

Good to know

Low seasonFebruary
Cheapest flightC$ 150
Best time to beat the crowds (28% less expensive on average)
Most popular time to fly (24% 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$ 150 for a one-way ticket and C$ 352 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 Air France 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 A330-200 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$ 768 and an overall rating of 7.9, Alaska Airlines is the most popular choice. WestJet is also a great choice for the route, with an average price of C$ 433 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$ 309 or less one-way and C$ 135 or less round-trip.

Prefer to fly direct from Seattle to Toronto Pearson Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Seattle/Tacoma Intl to Toronto Pearson Intl.
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,Alaska Airlines

Air Canada,Alaska Airlines

Tuesday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Wednesday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Thursday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Friday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Saturday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Sunday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

See more nonstop flights

Direct returns

Toronto Pearson Intl to Seattle/Tacoma Intl

Monday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Tuesday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Wednesday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Thursday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Friday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Saturday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Sunday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

See more nonstop flights

Reviews of the top 3 airlines flying 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.
7.9
Alaska AirlinesOverall score based on 12273 reviews
7.0Entertainment
8.5Crew
7.0Food
8.1Boarding
7.8Comfort
Airline reviews

See what I wrote in the previous section. This was a terrible experience. I would like refund.. I even paid an extra $70 for an aisle seat closer to the front to ensure that I got off early enough to catch the next flight. The fact that the plane did not wait, and even left eearlier, knowing that the first flight came in late, and was moved to a terminal three train stops away is appalling. My friend that flew JetBlue, their flight was delayed and came in later and the connecting flight WAITED for them. How is it that JetBlue could do that, and Alaska could not.

2.0 MediocreAnna, Apr 2026
SEA - LAX
Read more Alaska Airlines reviews

See what I wrote in the previous section. This was a terrible experience. I would like refund.. I even paid an extra $70 for an aisle seat closer to the front to ensure that I got off early enough to catch the next flight. The fact that the plane did not wait, and even left eearlier, knowing that the first flight came in late, and was moved to a terminal three train stops away is appalling. My friend that flew JetBlue, their flight was delayed and came in later and the connecting flight WAITED for them. How is it that JetBlue could do that, and Alaska could not.

This was my second time flying Alaska Airline in the 1st Class cabin. Everything was fine with the exception of the food and entertainment. The food was just ok but not what I was expecting from 1st Class. A BBQ pork sandwich and baked potato. There wasnt any in-flight entertainment. I found that odd since it was a coast to coast flight Seattle to Dulles. My sister flew 1st Class on Delta on a shorter flight ( Seattle to Cincinnati) and had an awesome meal and in-flight entertainment. I typically fly Delta but there wasn’t a flight with times that fit my schedule. I am by no means a primary donna. But when my upgrade cost over $900…I didn’t use any reward miles…I was expecting more than what I got. I will never fly Alaska Airline 1st Class again. I will stick with Delta for all my travel needs whether it’s in 1st Class or coach.

Good staff. Comfortable seats. Had to check my bag because the flight was too full.

Loved this first class flight! Awesome food, snacks and drinks. Comfortable seat with foot rest. Good movie. Very friendly crew! Only thing I would suggest is having a screen on seat back in front of me so I didn’t have to watch the movie on my phone.

The crew was very attentive, boarding was orderly. I really liked the way Alaska Airlines gives boarding passes and dropping off my bags. Very smooth.

Once we were in the air, the flight was nice and smooth. The flight was about twenty minutes late to begin with, though, and then we needed to wait to land for another plane to land first.

Flight crew great! No WiFi not great. Someone took my bag not great!

Alaska Airlines staff go out of their way to accommodate my fragile musical instrument, every time. They are unlike any other airline. I've experienced this can-do attitude on several flights with different staff, so this must be the culture of their company. I appreciate Alaska!

We never had an experience on Alaska Airlines. We missed our flight .

Flight was on time departure & arrival. Staff was efficient & attentive. Food was better than normal. Wish they had some sort of entertainment screens loke Delta. I would fly Alaska again though.

I thought the coffee was excellent! The wait for the luggage was acceptable.. It left and arrived on time. My son found that his device worked very well and he really enjoyed his flight! The stewardess moved him up to the emergency exit and he very much appreciated that!

I wasn’t able to book or pay for a seat and they forgot to check me in for my third flight so I spent 24 hours in Toronto waiting for another one.

Everything was good except for flight delay, but it was because of the snow storm in the arrival airport.

The flight was cancelled less than 24 hours before departure. The alternate flight was a day later going from Grenada to Toronto to Vancouver to Calgary to Montreal. 2 days in the air. Not serious, Very bad service

I like the wider seats, Plus lots of legroom, Lacking entertainment, no tv or screen to play with

Liked in-flight wifi Did not like - nothing to complain, really. All good

The keg from Edmonton to Toronto My wife found it very cold. Other than that great flight.

Smooth flight Staff were courteous and welcoming upon entering and exiting the plane Pilot and crew provided frequent updates Leg space was not pleasant but manageable

Everything was good except I was a bit disappointed that I had to pay US $150 for bags.

Flight itself good .Landing at terminal3 and connections to terminal1,it is connections nightmare,specially for disable person

It was a problem because there was a delay where we sat before taking off from newark,then when landed in Toronto we sat on tarmac and they wouldn't let us out for a long period of time. When we finally were released to the airport in Toronto the attendant scanned our boarding pass that we were here for our connection to Brazil. We ran all the way to the gate and they said at the gate the door is shut so we can not let you on the plane. We explained that we were checked in by the attendant when we arrived at Toronto airport to go to Brazil and they should not have shut the door. We were ignored at the gate

Flight home was delayed multiple times, did not get home until 2am

the check-in lady at ORD was extremely rude and unprofessional. very disappointed as it was supposed to be a celebration for my wife's birthday and it really put a damper on things. if i wanted to be treated like trash, i would have flown Economy! (as opposed to business class)

My original flight was cancelled and then rebooked four hours later on a recovery flight, but I was checked in as stanby and had no seats so as a family of four we were concerned about not being seated altogether. Our flight then got delayed by another 1.5 hours and when seats were assigned at the gate, three of the four of us were together and we could get my wife closer, they offered no assistance.

Good boarding but extremely cold temperature in both flights (60 F!).

Very rude gate attendants in San Francisco who didn’t let me bring my little carry on (smaller than usual size) and after boarding I realized that there still were a lot of overhead compartment space (like a full section available in some spots). That made me lose 30 minutes at my destination at 1am and it could have broken something fragile that I had in it

I want to thank Carlos at the Miami AC desk - he was amazing and went over and above to help us out. Thank you Carlos and all the best to you!!! You made our faith in AC feel great! Sincerely, David Cubitt

Flight was canceled due to mechanical issues. After a considerable wait in the queue, Air Canada customer service was very helpful to get us on another flight. I am disappointed to report our rescheduled flight is for three days from now. Three days of extra expenses and inconvenience is unacceptable.

The last 3 hours it was freezing cold in row 56. Multiple people had their winter coats on and were utilizing the blankets provided by the airline. I also did not have easy access to figure out how to book my food allergy and advance for my meals. Most of everything I received was something I couldn't eat. This needs to be made more accessible. Also, I'm 5'10 which is the average height of the American male. I flew from Philadelphia to Toronto and then to Tokyo and the seats were absolutely unbearable. For that long of a flight it is impossible to get comfortable when doing anything. Flights need to have more space and stop prioritizing costs over people.

Was delayed at every point/ connection. Luggages missing for 5days. Had no medications for diabetes and high B/p. when bags where finally delivered on the 30th, the insulin and ozempic were no longer patent, as the ice pack had since dissolved and the authenticity of the med is now questionable, since they must be refrigerated. Please have them refund my bag fees. I should sue them for all the inconveniences caused to me.

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

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