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 25/4. 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$ 324
Typical prices: C$ 424-C$ 628
Air Canada
Sat 25/4Fri 1/5
SEA - YYZ • Direct
Cheapest direct flights
C$ 333
Typical prices: C$ 466-C$ 693
Air Canada, Alaska Airlines
Sat 25/4Sat 2/5
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
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from C$ 324 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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
Top layover airports
Cheapest • Avg C$ 535 (round-trip)
Shortest trip • 6h 30m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 3 weeks in advance save around 51% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 30% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
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+1
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Pearson Intl!
Flight Deals
Booking Insights
Expert advice
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, 25 Apr - Fri, 1 May
Air Canada Logo
8:00 a.m. - 3:54 p.m.
SEA
-
YYZ
4h 54mdirect
Air Canada Logo
12:30 a.m. - 10:05 a.m.
YYZ
-
SEA
12h 35m
2 stops
C$ 324Air Canada
Sat, 25 Apr - Fri, 1 May
Air Canada Logo
8:00 a.m. - 3:54 p.m.
SEA
-
YYZ
4h 54mdirect
Air Canada Logo
12:30 a.m. - 9:50 a.m.
YYZ
-
SEA
12h 20m
2 stops
C$ 331Air Canada
Sat, 25 Apr - Sat, 2 May
Multiple Airlines Logo
8:00 a.m. - 3:54 p.m.
SEA
-
YYZ
4h 54mdirect
Multiple Airlines Logo
4:55 p.m. - 7:23 p.m.
YYZ
-
SEA
5h 28mdirect
C$ 333Multiple Airlines
Sat, 2 May - Fri, 8 May
Air Canada Logo
8:00 a.m. - 3:50 p.m.
SEA
-
YYZ
4h 50mdirect
Air Canada Logo
12:30 a.m. - 9:50 a.m.
YYZ
-
SEA
12h 20m
2 stops
C$ 337Air Canada
Sat, 25 Apr - Sat, 2 May
Alaska Airlines Logo
7:55 a.m. - 3:45 p.m.
SEA
-
YYZ
4h 50mdirect
Alaska Airlines Logo
4:55 p.m. - 7:23 p.m.
YYZ
-
SEA
5h 28mdirect
C$ 339Alaska Airlines
Sat, 2 May - Fri, 8 May
Air Canada Logo
10:30 a.m. - 1:13 a.m.
SEA
-
YYZ
11h 43m
2 stops
Air Canada Logo
12:30 a.m. - 9:50 a.m.
YYZ
-
SEA
12h 20m
2 stops
C$ 342Air Canada
Sat, 25 Apr - Sat, 2 May
Air Canada Logo
10:20 a.m. - 11:46 p.m.
SEA
-
YYZ
10h 26m
2 stops
Air Canada Logo
6:45 p.m. - 9:08 p.m.
YYZ
-
SEA
5h 23mdirect
C$ 347Air Canada
Tue, 5 May - Tue, 12 May
Air Canada Logo
2:55 p.m. - 1:38 a.m.
SEA
-
YYZ
7h 43m
1 stop
Air Canada Logo
6:45 p.m. - 9:08 p.m.
YYZ
-
SEA
5h 23mdirect
C$ 357Air Canada
Sat, 25 Apr - Fri, 1 May
Air Canada Logo
10:20 a.m. - 1:08 a.m.
SEA
-
YYZ
11h 48m
1 stop
Air Canada Logo
12:30 a.m. - 10:05 a.m.
YYZ
-
SEA
12h 35m
2 stops
C$ 359Air Canada
Sat, 2 May - Sat, 9 May
Air Canada Logo
8:00 a.m. - 3:50 p.m.
SEA
-
YYZ
4h 50mdirect
Air Canada Logo
6:45 p.m. - 9:08 p.m.
YYZ
-
SEA
5h 23mdirect
C$ 361Air Canada
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 April.

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 Friday, 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$ 364 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is C$ 668 and C$ 621 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$ 258 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 51% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 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 (18% 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$ 324 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, United Airlines, Alaska Airlines, and Virgin Atlantic 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 A330-900neo 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$ 693 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$ 435 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$ 217 or less one-way and C$ 535 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 12101 reviews
8.5Crew
7.0Entertainment
7.0Food
8.1Boarding
7.8Comfort
Airline reviews

The final trip home wasn’t as bad as the trip there. Even with the paid upgrade the comfort level was mediocre at best.

6.0 GoodAnonymous, Mar 2026
SEA - JFK
Read more Alaska Airlines reviews

The final trip home wasn’t as bad as the trip there. Even with the paid upgrade the comfort level was mediocre at best.

I paid $129 to be upgraded to better seat only ti be completely ignored by flight attendants I think because I used the front restroom ???? I was dozing off and on but I was never once offered a beverage or snack but my seat mates were served numerous double vodkas. I want my money back. I tried to call Alaska Airlines complaints phone number and was told it was 2.5 hours to hold.

Don’t fly with Alaska if you have a layover in Seattle. Guaranteed to screw you over. We waited at terminal S3 &were >2 hours delayed(mechanical issues)and told to change terminals to a different plane that required riding 3 shuttles to get to new terminal N14. Then they delayed the flight even further and changed gates again. when I went to the customer service in terminal N, the manager turned me away without apologizing & refused to assist me but mandated I leave her alone as her shift is nearly finished and insisted I totake another 2 shuttles to terminal C so I can just talk to another service rep while dragging my family of 4/ kids in tow.

i canceled my flight from SEA to SFO, SNA to SEA and received full refund from Alaska Airlines. i am pleased with the customer service.

Departing flight for our weekend trip was cancelled due to weather which meant our return flight was useless. The whole thing was difficult to get support through but Alaska did recover and was able to reimburse us for the flights yesterday. For some reason, Kayak was not kept in the loop, adding to the confusion.

i canceled my return flight package with Alaska Airlines. Customer Service was excellent and assisted me to cancelled both of our reservations and returned the payment in full. that is excellent service and understanding and empathy of the customers' needs. i like Alaska Airlines and recommend AS to everyone.

Never got on because the airline sent the WRONG plane to take us on our first leg of the trip so we missed ALL connecting flights. No help available from anyone at the airline…

The crew inside the airport for Alaska was rude, lazy and incompetent

The flight was extremely smooth, and so was the landing. Great piloting.

Plane was clean, staff was professional and flight was on time. No built in tv was still ok, as programs were offered that could synch to smart phones.

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

The flight attendants were super! They created a cosy and warm flight atmosphere!

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.

The plane was delayed substantially due to a mechanical problem, that being said, the airline was very fair with providing a meal coupon for us. I would rather arrive late on a mechanically sound plane than the alternative. The food served in the plane was just awful, however and I recommend a new catering company.

I waiting for 2 hrs to retrieve my luggage. Didn't get home till 3am.

The flight left late and I didn’t get a glass of bubbly upon boarding (which I’m used to when booking business class on other flights), but otherwise it was a pleasant flight with lovely, helpful crew members and I enjoyed my meal.

Flight was canceled for a reason they knew hours before but did not mention. Next the gate chnage from 37 to 38 at least 10 times. Ridiculous.

It was just fine. I managed to make all my connection too sbut had trouble in Munich with no wheel chair and trouble trying to get help from the airport people to get to the other terminal for my flight. Finally a wonderful lady Amelia, helped me to make my flight connection Timon with zero time to spare.

Super experience. Earlier than schedule departure and arrival. Baggage handling was very good

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

Information on your arrival and departure airports