SEA - YYZ

C$ 90 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 29/4. 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$ 305
Overall average: C$ 514
Multiple Airlines
Fri 24/4Sun 26/4
SEA - YYZ • Direct
Cheapest direct flights
C$ 312
Typical prices: C$ 397-C$ 697
Multiple Airlines
Sun 12/4Fri 17/4
SEA - YYZ • Direct
Our travellers' advice
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
WestJet
Cheapest • from C$ 308 (round-trip)
Alaska Airlines
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 61% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 32% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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

Fri, 24 Apr - Sun, 26 Apr
Multiple Airlines Logo
7:55 a.m. - 3:45 p.m.
SEA
-
YYZ
4h 50mdirect
Multiple Airlines Logo
12:00 p.m. - 8:28 p.m.
YYZ
-
SEA
11h 28m
2 stops
C$ 305Multiple Airlines
Fri, 6 Feb - Tue, 10 Feb
WestJet Logo
11:55 a.m. - 11:38 p.m.
SEA
-
YYZ
8h 43m
2 stops
WestJet Logo
7:45 a.m. - 2:19 p.m.
YYZ
-
SEA
9h 34m
1 stop
C$ 308WestJet
Tue, 27 Jan - Sat, 31 Jan
Air Canada Logo
8:00 p.m. - 6:15 a.m.
SEA
-
YYZ
7h 15m
1 stop
Air Canada Logo
7:50 p.m. - 10:16 p.m.
YYZ
-
SEA
5h 26mdirect
C$ 310Air Canada
Sun, 12 Apr - Thu, 23 Apr
Multiple Airlines Logo
6:18 p.m. - 6:43 a.m.
SEA
-
YYZ
9h 25m
1 stop
Multiple Airlines Logo
7:45 a.m. - 2:19 p.m.
YYZ
-
SEA
9h 34m
1 stop
C$ 311Multiple Airlines
Sun, 12 Apr - Fri, 17 Apr
Multiple Airlines Logo
8:05 a.m. - 3:45 p.m.
SEA
-
YYZ
4h 40mdirect
Multiple Airlines Logo
7:30 p.m. - 9:51 p.m.
YYZ
-
SEA
5h 21mdirect
C$ 312Multiple Airlines
Sun, 12 Apr - Tue, 21 Apr
Multiple Airlines Logo
6:18 p.m. - 6:43 a.m.
SEA
-
YYZ
9h 25m
1 stop
Multiple Airlines Logo
7:45 a.m. - 2:19 p.m.
YYZ
-
SEA
9h 34m
1 stop
C$ 314Multiple Airlines
Sat, 18 Apr - Wed, 29 Apr
Air Canada Logo
8:00 a.m. - 3:54 p.m.
SEA
-
YYZ
4h 54mdirect
Air Canada Logo
12:00 p.m. - 10:10 p.m.
YYZ
-
SEA
13h 10m
2 stops
C$ 315Air Canada
Sat, 18 Apr - Fri, 24 Apr
Air Canada Logo
5:50 a.m. - 9:06 p.m.
SEA
-
YYZ
12h 16m
2 stops
Air Canada Logo
8:00 a.m. - 3:03 p.m.
YYZ
-
SEA
10h 03m
2 stops
C$ 316Air Canada
Thu, 23 Apr - Sun, 26 Apr
WestJet Logo
3:10 p.m. - 5:58 a.m.
SEA
-
YYZ
11h 48m
2 stops
WestJet Logo
9:00 a.m. - 8:28 p.m.
YYZ
-
SEA
14h 28m
2 stops
C$ 318WestJet
Sun, 12 Apr - Sat, 18 Apr
Air Canada Logo
10:10 a.m. - 9:20 p.m.
SEA
-
YYZ
8h 10m
1 stop
Air Canada Logo
9:00 p.m. - 9:33 a.m.
YYZ
-
SEA
15h 33m
1 stop
C$ 319Air 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.

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$ 368 (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$ 676 and C$ 662 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$ 326, 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 61% 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.
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.

Airports
SEA

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

YYZ

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

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

Good to know

Low seasonJanuary
Cheapest flightC$ 90
Best time to beat the crowds (33% less expensive on average)
Most popular time to fly (22% 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$ 90 for a one-way ticket and C$ 305 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?

    All the following airlines offer inflight Wi-Fi service on the Seattle to Toronto Pearson Airport flight route: Air Canada, United Airlines, Alaska Airlines, Air France, Virgin Atlantic, Delta, and Lufthansa.

  • 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 United Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to Toronto are Alaska Airlines and United Airlines. With an average price for the route of C$ 788 and an overall rating of 7.9, Alaska Airlines is the most popular choice. United Airlines is also a great choice for the route, with an average price of C$ 542 and an overall rating of 7.4.

  • 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$ 169 or less one-way and C$ 322 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 4 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 11701 reviews
8.5Crew
7.8Comfort
8.1Boarding
7.0Entertainment
7.1Food
Airline reviews

How can I review what was denied to me. Instead of offering to let me pay for the ticket I got booted of my flight with no way home and no choice but to purchase another ticket for 12 hours later. Filing a complaint with the DOT

2.0 MediocreAnonymous, Jan 2026
SEA - ANC
Read more Alaska Airlines reviews

How can I review what was denied to me. Instead of offering to let me pay for the ticket I got booted of my flight with no way home and no choice but to purchase another ticket for 12 hours later. Filing a complaint with the DOT

From Las Vegas to Boise all went well. However, our flight was delayed in Boise and I missed my connecting flight from Seattle to Pasco. Moreover, the last flight to Pasco was full and I was booked on the 11:30 flight Sunday and given a hotel accommodation. However, I was scheduled to deliver the Sunday morning service at my church and needed to arrive no later than 10:00. Therefore, I booked a Delta flight scheduled to arrive in Pasco at 23:09. My piece of luggage checked in Las Vegas arrived in Pasco earlier today. I waited at the airport for over an hour last night to speak with an Alaska agent to no avail. I went back after church this morning in search of my piece of luggage and it could not be located. After waiting for 40 minutes to speak to the agent authorized to take my claim, he announced that he was closing the counter to assist on the flight line but not before providing me with a telephone number that would help me with filing my claim. Before I was able to make the call (due to other factors) I received a call from Alaska agent informing me that my luggage had just arrived and I am now waiting for it to be delivered. I deliberately took the more complicated route home to ensure that I would be home in plenty of time to prepare for myself for the Sunday service and accommodate my relatives’ needs. I believe the airport is undermanned given the number of flights coming in and going out. It was fiasco last night with three flights waiting for luggage and another flight landing within minutes. Today’s problems stemmed from a lack of cross training and a serious amount of cargo/baggage going out and too few people scheduled to cover.

The cabin crew was absolutely wonderful, the service was great and it was just a good flight overall.

I like them since I live in Alaska and I don't have much choice

The flight attendants were nice, but the cabin and seats were uncomfortable.

Food was terrible, noisy plane & would never pay to fly first class again. Seats in regular price are too small, no leg room & center aisle much too, too small. Seats in 1st class larger but not comfortable.

Overall, once we took off, our flight was good. Flight departure was significantly delayed due to mechanical issues. Upon arrival, it took wayyy too long to retrieve checked bags.

The ticket I purchased through Kayak did not show up in my Alaska Airlines app, and neither of the codes given to me worked for online check in. I've never had to show up to the airport at 6am wondering if I've been scammed. Cheap flight fare or whatever does not play well with airlines and I will be wary of using Kayak in the future.

Crew was rude and passive aggressive when i told them I didnt want to check my duffel bag. Then a crew member slammed my bag to the side when organizing the overhead compartment. The plane had worn leather seats with no infotainment. Plane landing was noticeably rough (this is the one year ive flown multiple times and out of american and delta this was the worst). The only redeeming quality is that we were noticeably earlier than we should have been.

The plane was delayed which was annoying. No seat back screens is a bummer. Staff if great

Not United Airlines' fault. It's ORL airport's fault.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

Very nice flight love the small aircraft. We had a wonderful flight attendant. Nice to see someone that really enjoys her job. Don't have her name but had a southern accent.

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

Flight was good but there are way to many announcements for credit cards etc.

I had no checked baggage but was required to hand over carry on baggage at the door of the plane. There was a lot of overboard space in the plane and I was one of the last ones. I ran to get my carry on but it was gone. I was given back at the plane door in Toronto, so the wait was not as long as it would have been at the carousel.

We had a layover from YVR to Denver. We bought 4 bottles of Absolut Vodka at the YVR Duty Free for $116.20, after going through security and American Customs Pre Clearance at YVR, Vancouver. When we landed in Denver, United put us behind the American Customs as well as TSA again for some reason. We were forced to go through American Customs and TSA again. TSA confiscated our rightfully owned Duty Free Absolut Vodka bottles. Because United incorrectly forced our flight behind American border and TSA again, we missed the connecting flight. After United put us on a later flight, we eventually arrived in Chicago very late, with hardly any sleep. I am looking for compensation from United for our incorrectly confiscated Absolut Vodka bottles worth $116.20, as well as compensation for incorrectly putting us behind American Customs and TSA again, causing us to miss our connecting flight, making us arrive extremely late in Chicago.

From the first moment you interact with United Airlines, you can expect nothing less but extreme frustration. The baggage handler at the bag drop seems completely unbothered by the presence of customers waiting in line. No help was extended to load the baggage whatsoever. And if any of your bags is overweight by 0.01 pound they will make you re-distribute everything in your suitcase just to play power trip. When it was time to board no help was extended to customers to locate their seats. Moreover. It was a chaotic mess at the gate when it was unclear who should board first and everyone just bunched up, trying to get on the plane. I am sure the crew was doing their best to perform their jobs while being paid their wages however it shouldn’t be that hard to smile once or twice when you’re in the business if serving customers. It is a shame for the United States of America to have a flagship carrier of such low caliber. Our flight was also delayed by about an hour and a half due to further delays prior to our inbound flight. Being someone who has travelled for both business and leisure in Asia, Europe, and South America I have never experienced such poor quality of service.

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!

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.

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

I would like to get my money back. I flight was 4 hours late on the way to detroit, And same on my way back to Brussels they cancelled my flight and give me an other ticket and i had to wait 5 hours.

All attendents were very efficient, pleasant and happy. Everything went smoothly. The seats could have been wider. There could have been more free food instead of just one small bar.

My seat was one of those that couldn't recline, but the problem was that it was abnormally upright, so the headrest actually made the seat concave, which was uncomfortable and hard on my lower back. I had to ball my jacket up and use it as lumbar support. goodness I had it with me.

I liked a lot , the flight attendant so nice ,the seat very comfortable I enjoyed the flight , I will do it again with Air Canada,

Elderly female flight attendant was not customer friendly. There were only about 12 people on a regional jet that had about 60 seats. There were 8 exit row seats and none of them were taken. We attempted to sit in those seats and the flight attendant gave the standard " you didn't pay for those" so she would not allow us to move. What harm would that have caused ? They assigned seats to 5 of the 12 people in 2 rows, row 20 and 21. A simple friendly customer experience gesture of allowing us to sit in exit rows would have gone a long way in me having a very favorable impression on Air Canada. After that I have very poor impression of Air Canada and will not fly with them when I can avoid it.

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

Information on your arrival and departure airports