SEA - YYZ

C$ 116 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 5/9. 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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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

Fri, 3 Oct - Sun, 5 Oct
WestJet Logo
1:15 p.m. - 12:31 a.m.SEA-YYZ
8h 16m1 stop
WestJet Logo
6:45 a.m. - 12:33 p.m.YYZ-SEA
8h 48m1 stop
C$ 285WestJet
Find Deal
Fri, 10 Oct - Sun, 12 Oct
WestJet Logo
1:15 p.m. - 12:31 a.m.SEA-YYZ
8h 16m1 stop
WestJet Logo
6:45 a.m. - 12:33 p.m.YYZ-SEA
8h 48m1 stop
C$ 287WestJet
Find Deal
Fri, 26 Sep - Sun, 12 Oct
WestJet Logo
1:15 p.m. - 12:31 a.m.SEA-YYZ
8h 16m1 stop
WestJet Logo
6:45 a.m. - 12:33 p.m.YYZ-SEA
8h 48m1 stop
C$ 292WestJet
Find Deal
Fri, 19 Sep - Sun, 21 Sep
WestJet Logo
1:15 p.m. - 12:31 a.m.SEA-YYZ
8h 16m1 stop
WestJet Logo
6:45 a.m. - 12:35 p.m.YYZ-SEA
8h 50m1 stop
C$ 295WestJet
Find Deal
Fri, 19 Sep - Tue, 30 Sep
WestJet Logo
1:15 p.m. - 12:31 a.m.SEA-YYZ
8h 16m1 stop
WestJet Logo
8:00 a.m. - 12:59 p.m.YYZ-SEA
7h 59m1 stop
C$ 296WestJet
Find Deal
Fri, 26 Sep - Wed, 8 Oct
WestJet Logo
1:15 p.m. - 12:31 a.m.SEA-YYZ
8h 16m1 stop
WestJet Logo
12:00 p.m. - 8:29 p.m.YYZ-SEA
11h 29m2 stops
C$ 298WestJet
Find Deal
Fri, 5 Sep - Sun, 7 Sep
WestJet Logo
1:15 p.m. - 12:31 a.m.SEA-YYZ
8h 16m1 stop
WestJet Logo
6:45 a.m. - 12:35 p.m.YYZ-SEA
8h 50m1 stop
C$ 301WestJet
Find Deal
Fri, 26 Sep - Tue, 14 Oct
WestJet Logo
1:15 p.m. - 12:31 a.m.SEA-YYZ
8h 16m1 stop
WestJet Logo
8:00 a.m. - 12:59 p.m.YYZ-SEA
7h 59m1 stop
C$ 303WestJet
Find Deal
Fri, 26 Sep - Tue, 14 Oct
 Logo
1:15 p.m. - 12:31 a.m.SEA-YYZ
8h 16m1 stop
 Logo
4:45 p.m. - 7:08 p.m.YYZ-SEA
5h 23mdirect
C$ 325
Find Deal
Tue, 23 Sep - Tue, 7 Oct
 Logo
2:05 p.m. - 12:22 a.m.SEA-YYZ
7h 17m1 stop
 Logo
4:45 p.m. - 7:08 p.m.YYZ-SEA
5h 23mdirect
C$ 342
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
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?

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 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$ 419 (return) on average. On the other hand, the most expensive months are June and November, where the average cost of round-trip tickets is C$ 725 and C$ 710 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.

No, with an average price for the route of C$ 840, prices are generally cheapest when you fly direct.

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, which saves you about 56% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flightC$ 116
Best time to beat the crowds (30% less expensive on average)
Most popular time to fly (19% 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$ 84 for a one-way ticket and C$ 207 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?

    Alaska Airlines, Air Canada, 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 Boeing 737 MAX 8 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$ 727 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$ 416 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$ 355 or less one-way and C$ 871 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,Air Tahiti Nui,Alaska Airlines, +4 more

Air Canada,Air Tahiti Nui, +5 more

Tuesday

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

Air Canada,Air Tahiti Nui, +5 more

Wednesday

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

Air Canada,Air Tahiti Nui, +5 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, +4 more

Air Canada,Air Tahiti Nui, +5 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, +3 more

Air Canada,Air Tahiti Nui, +4 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, +3 more

Air Canada,Air Tahiti Nui, +4 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, +3 more

Air Canada,Air Tahiti Nui, +4 more

Sunday

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

Air Canada,Air Tahiti Nui, +4 more

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.
8.0
Alaska AirlinesOverall score based on 10000 reviews
8.5Crew
7.1Food
7.8Comfort
7.0Entertainment
8.1Boarding
Airline reviews

Didn't care for the crowding at the gate area at SEA TAC. Not a fault of the airline.

8.0 ExcellentAnonymous, Aug 2025SEA - PHX
Read more Alaska Airlines reviews

Didn't care for the crowding at the gate area at SEA TAC. Not a fault of the airline.

Loved the staff ease of flying snacks and free movies and WiFi

you could have gotten me there on the day I was supposed to be there, not a day later. Paid for 3 nights at a VRBO and got to spend only 2 nights there.

Flight crew and gate staff were very polite and professional. They were very helpful and made my trip smooth and trouble free

Our flight was delayed BY 6 hours and the reason it was delayed because they needed a part which made me be worried about the plane. They did not have any TVS. Add the seeds and this was a very long flight. But they also only offered snacks, and even after we waited the 6 hours of being delayed with that, we still have to pay for drinks. If we we wanted one

all crew, pilots and attendants were fantastic. Both to and from flight to SEA, attendants went above and beyond.

Late boarding, but the flight was smooth and the crew was accommodating.

I requested wheelchair assistance in Seattle transferring gates and in Anchorage to get to baggage claim. No assistance was provided at all.

I was totally disgusted at the stewardesses supplying the three passengers in front of us in the exit row with multiple rounds of booze. They were loud and inappropriate using profanity to share stories. Our 3 and 7 year old he’s d it as well. Just flat out inappropriate and amazed AA wasn’t implementing a drink limit policy.

Arrived in Seattle to find our non stop flight was canceled and that we were rebooked to depart 16 hrs later. We stood in customer relation line for well over an hour and a half to find out what to do with our frozen fish that was checked bags and to get to our destination in a more timely fashion. There were only 2 Alaska reps working trying to help at least 2 cancelled flights that we know about. At one point a 3 rd rep showed up and shortly after one rep left stating she was going on break. There were atleast 50 people still in line. Finally We were rerouted through a different airport adding another stop the next day and given flight confirmation but no seat assignment stating ticket vouchers needed to be attached. We were then told to go to Alaska air luggage to request our fish be put in the freezer. The supervisor at baggage told us the freezer was full and that there was nothing he could do about it. Luckily he walked off and the ladies at the counter made sure our fish was put in the freezer. The following morning we had to be back to baggage to make sure our fish was tagged appropriately to get to our destination on a separate flight. . Both of our return flights we had to take we had to stand in line for the ticket people to try to find our ticket vouchers to attach to the boarding passes we were given. Al together our return took 31 hrs instead of the 12 hrs scheduled.

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 seats very Uncomfortable, no meal and no entertainment for a 4Hours flight. Smooth Flight, Great Take off and landing. Superb crew!

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

West Jet flight was cancelled and I was not notified. I found out when I tried to check in on-line. Spent 4 hours on the phone with West Jet and Just Fly trying to figure what happened.

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

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

Refreshments and Air Hostess was good. Issues with customs in Toronto caused flight to depart and left me behind twice. Vouchers for delayed flight needs to increase.

Long wait to check in at the priority counter in Toronto

I had no communication, receipt etc from Air Canada until hours before flight

I booked my flight months ago, and checked-in online about 12 hours before the flight. I received an email confirmation of check-in. I had no subsequent communication from Air Canada after my original booking. After arriving at the airport three hours before the flight, as instructed, I waited 90 minutes for an agent to appear to check my bag. I was informed that my flight had been canceled many weeks before, and that flight was no longer being run!! I showed a copy of my check-in confirmation, but no explanation could be found. I was placed on standby for the next flight and the connection. Luckily, those flights were not full and I arrived at my destination. I double checked my email, but I received no update about the flight from Air Canada until the day of the flight.

I was forcefully re-routed to another destination and was delayed a total of 8hours. I have still not received my bags, no one is taking responsibility. The agents at the airport lied to me that I will get to my destination same time as my previous flight where I was forcefully re-routed from.

Flight was delayed by 1.5hrs. Once inside, people had their small handbags on the storage. The crew (male guy) was not helpful in making some space in the storage. Instead, he asked few bags to be checked-in and it was not a great experience. No attempt to help but just followed the things with a straight face. People had their literally small bags and he wouldnt not move from one storage to another even if there was space and would not let us do i as well. Once flight was on, they ran out of Orange juice, really running out of orange juice when the temp were 32.degrees outside. didnt made the sense. Onasking for a extra snack, he made a face as if he was giving me out of his pocket. if the flight was delayed, there could have an attempt to provide something extra incase people did asked.

Our flight was canceled at the last minute. Someone on the flight said the exact same thing happened to her the day before. I will say they helped us book a flight on another airline so that we could still make our vacation with little delay.

We had a very long delay. First the inbound flight took a while, then maintenance, they “fixed it” to then do boarding and leave the gate, and waste a lot of time to have to go back to the gate and eventually deplane. Had to wait for a new aircraft, wait for a gate, and do the whole thing again. Instead of leaving at 9:50am we left until past 1. I could’ve not woken up at 5am, or spend some more time with my family if they gave more grace period of time between flights to give some time in case of any issues. But they have to make all and every dollar possible

Abandoned me in hallway in a wheelchair… which I asked for because I sprained my back. After waiting in the hallway, I decided to walk the rest of the way since someone respecting me up.. My experience with the united was totally the opposite. Wheelchair access, propped swift and save me a lot of grief. Air Canada totally disorganized.

Bad experience boarding and flight got delayed didn’t make it to my next flight

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

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