YYZ - SEA

C$ 248 Find Cheap Flights from Toronto Pearson Airport to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Pearson Intl to Seattle departing on 12/9. 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, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

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

Cheapest round-trip
C$ 425
Typical prices: C$ 640-C$ 383
WestJet
Thu 24/9Mon 28/9
YYZ - SEA • 1 stop
Cheapest direct flights
C$ 482
Typical prices: C$ 592-C$ 357
Air Canada
Wed 14/10Wed 21/10
YYZ - SEA • Direct
Top airlines
Cheapest • from C$ 425 (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 5h 26m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 83% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg C$ 318 (round-trip)
Shortest trip • 7h 18m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 4 weeks in advance save around 55% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 32% price drop
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 Seattle!
Flight Deals
Booking Insights
Expert advice
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Pearson Intl to Seattle 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 Pearson Intl to Seattle

Thu, 24 Sep - Mon, 28 Sep
WestJet Logo
1:30 p.m. - 6:45 p.m.
YYZ
-
SEA
8h 15m
1 stop
WestJet Logo
10:30 a.m. - 9:15 p.m.
SEA
-
YYZ
7h 45m
1 stop
C$ 425WestJet
Thu, 24 Sep - Mon, 28 Sep
WestJet Logo
12:00 p.m. - 6:45 p.m.
YYZ
-
SEA
9h 45m
1 stop
WestJet Logo
7:35 p.m. - 6:55 a.m.
SEA
-
YYZ
8h 20m
1 stop
C$ 432WestJet
Tue, 28 Jul - Fri, 28 Aug
WestJet Logo
12:00 p.m. - 6:45 p.m.
YYZ
-
SEA
9h 45m
1 stop
WestJet Logo
10:30 a.m. - 9:15 p.m.
SEA
-
YYZ
7h 45m
1 stop
C$ 447WestJet
Thu, 23 Jul - Thu, 6 Aug
WestJet Logo
12:00 p.m. - 6:45 p.m.
YYZ
-
SEA
9h 45m
2 stops
WestJet Logo
10:30 a.m. - 11:59 p.m.
SEA
-
YYZ
10h 29m
2 stops
C$ 457WestJet
Thu, 20 Aug - Fri, 28 Aug
WestJet Logo
12:00 p.m. - 6:45 p.m.
YYZ
-
SEA
9h 45m
2 stops
WestJet Logo
10:30 a.m. - 9:15 p.m.
SEA
-
YYZ
7h 45m
1 stop
C$ 459WestJet
Tue, 14 Jul - Fri, 31 Jul
WestJet Logo
1:30 p.m. - 6:45 p.m.
YYZ
-
SEA
8h 15m
1 stop
WestJet Logo
10:30 a.m. - 11:59 p.m.
SEA
-
YYZ
10h 29m
2 stops
C$ 460WestJet
Fri, 24 Jul - Sun, 26 Jul
WestJet Logo
3:50 p.m. - 9:00 p.m.
YYZ
-
SEA
8h 10m
1 stop
WestJet Logo
7:35 p.m. - 6:55 a.m.
SEA
-
YYZ
8h 20m
1 stop
C$ 461WestJet
Thu, 20 Aug - Fri, 28 Aug
WestJet Logo
2:50 p.m. - 9:00 p.m.
YYZ
-
SEA
9h 10m
1 stop
WestJet Logo
10:30 a.m. - 9:15 p.m.
SEA
-
YYZ
7h 45m
1 stop
C$ 463WestJet
Thu, 16 Jul - Mon, 20 Jul
WestJet Logo
12:00 p.m. - 9:00 p.m.
YYZ
-
SEA
12h 00m
2 stops
WestJet Logo
7:00 a.m. - 9:10 p.m.
SEA
-
YYZ
11h 10m
2 stops
C$ 464WestJet
Thu, 20 Aug - Fri, 28 Aug
WestJet Logo
12:00 p.m. - 9:00 p.m.
YYZ
-
SEA
12h 00m
2 stops
WestJet Logo
10:30 a.m. - 9:15 p.m.
SEA
-
YYZ
7h 45m
1 stop
C$ 467WestJet
Booking Insights

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

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

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

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

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

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

When flying from Toronto Pearson Airport to Seattle, you should consider leaving on a Thursday and avoid Mondays if you are looking for the best rates. For your return to Toronto Pearson Airport, you’ll find the best rates on Thursdays and the most expensive ones on Mondays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Toronto Pearson Intl Airport to Seattle, 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 Toronto Pearson Intl Airport to Seattle is February, where tickets cost C$ 322 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is C$ 622 and C$ 613 respectively.

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

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 2 stops layover the cheapest option at C$ 405 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Toronto Pearson Intl Airport to Seattle, 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 Toronto Pearson Intl Airport to Seattle, you should book around 4 weeks before departure, which saves you about 55% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Expert advice

Expert advice for your flight from Pearson Intl to Seattle

 
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 seasonJanuary
Cheapest flightC$ 248
Best time to beat the crowds (25% less expensive on average)
Most popular time to fly (10% more expensive on average)
Flight from Toronto Pearson Airport to Seattle

When to book flights from Pearson Intl to Seattle

Are your dates flexible? Find out the best times to travel from Pearson Intl to Seattle 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 Toronto Pearson Airport to Seattle flights

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

    In the last 5 days, the lowest price for a flight from Toronto Pearson Intl Airport to Seattle was C$ 248 for a one-way ticket and C$ 425 for a round-trip.

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

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

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

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

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Toronto to Seattle are Alaska Airlines and Delta. With an average price for the route of C$ 444 and an overall rating of 7.9, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of C$ 528 and an overall rating of 7.9.

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

    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 Toronto Pearson Airport to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Toronto Pearson Airport 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 Toronto Pearson Airport to Seattle?

    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 Seattle with an airline and back to Toronto Pearson Airport with another airline.

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

    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 Seattle from Toronto Pearson Airport 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 Toronto Pearson Intl Airport to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 346 or less one-way and C$ 750 or less round-trip.

Prefer to fly direct from Toronto Pearson Airport to Seattle?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Toronto Pearson Intl to Seattle/Tacoma Intl.
Find which airlines fly direct from Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

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

Direct returns

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

Reviews of the top 5 airlines flying from Pearson Intl to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Toronto to Seattle. 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 Pearson Intl to Seattle? 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 12480 reviews
8.1Boarding
8.5Crew
7.8Comfort
7.0Entertainment
7.0Food
Airline reviews

For a 5hrs flight a simple meal should provided instead of snacks only

6.0 GoodIvonny, Jun 2026
RDU - SEA
Read more Alaska Airlines reviews

For a 5hrs flight a simple meal should provided instead of snacks only

Missoula is a great airport. Desk and gate crews were very helpful and friendly

Other than delaying take off by an hour, the flight was smooth. Crew were kind and supportive, and made sure we were always considered as a priority.

Flight was on time. My pre-ordered meal came as expected.

Excellent flights. On time. Good service. Better than expected food. Comfortable seats. Too much dependent on personal phones for information and entertainment.

Flight was delayed and we were left in the plane with planed turned off, took so long to get to destination and luggages were lost. Such a hectic travel

The flight was delayed out of BIL so many times that I was not able to make my connection. I was rebooked for the next day, losing a full day of my trip. I still have not been compensated as promised.

Flight was delayed, but not be a lot. Crew at the departure gate was friendly. Flight was filled with turbulence, enough to concern my husband. Snacks were delivered to rows in front of us but attendant stopped handing out snacks when she got to our row. Team was efficient but lackadaisical. Usually on board crews are more animated and friendly. No onboard entertainment and no seatback video screens for a six hour flight. Landing was a bit rough. We were told the wrong turnstile for luggage.

2 hour delay. Then some luggage was unloaded at 1baggage claim #7 then without notice the baggage claim was changed to #12. No one informed the passengers they were changing baggage claim turnstile. Several of us waited for 90 minutes after the 1st turnstile stopped and changed to other flights luggage.

Many gate changes in Seattle and mechanical problems on plane which resulted in a new gate change. Both flights, from Seattle to Detroit and Seattle to Eugene resulted in a lot of walking and tram taking.

Only beverages were offered to first class and I thought the flight attendant could have also served the Delta Comfort as well instead of sitting down and staring at her phone and walking past all of us to the back of the plane to charge her phone more. There was a complete lack of turbulence and was safe enough for flights attendant to walk around in the front of the plane, collect trash and serve a few people water and turn off the seat belt light. Also didn’t enforce people putting their seats into the upright position and allowed two passengers to remain reclined during landing. They seemed out to lunch completely. Usually my experience on Delta is much better.

The seats were really comfortable. Flight crew were friendly with passengers. Overall was a great flight.

Arrived early, comfortable seats (Comfort+). Mediocre food, poor wifi (intermittent).

Long story short, it was one of the better flight experiences I've had in some time when compared with other airlines.

Flight was great! This flight from Atlanta was even better than when I paid for Comfort from SNA to Atlanta.

Much better than I expected. I had an economy ticket so I was really happy the flight was so comfy and the service so generous. Passengers were all polite too.

Round trip flight to Canada and back to the US was smooth and efficient.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

Boarding was smooth and efficient. The only food was some pretzels, but it was a short flight. Not much to order if you were hungry.

Crew were welcoming, accommodating and they worked hard to find places for all carry on.

Seats very comfortable; service efficient and pleasant; flight was on-time; boarding organized.

Starlink is great Crew was polite Business class didn’t get a welcome drink just water and snacks were ok

very average service no complimentary alcoholics drinks unlike other airlines such as Porter airlines No decent seats available during check-in time the day before

Smooth and easy boarding, comfortable for the entire 5 hour flight, and the seat back entertainment was great! I appreciated all the features, from location info and maps, movies, the ability to connect with Bluetooth headphones, and good selection of movies. Food was good, normal airline snacks (I didn’t purchase anything)

Hopped on time for the flight only to get deplaned and delayed another 2.5 hours.

Flight attendants had a little attitude. Food tastes no good.

Very poor. The flight was delayed from Toronto because some forget to do there job . I got to my connecting gate in San Francisco 10 minutes before the departure.but this didn’t let me board even though the flight was still there for an other 30 minutes. The the gentleman at the unite airline desk told me that they usually wait for passengers but air Canada called and told them not to we I been rerouted to Manila instead of Hong Kong . In San Francisco they mad me check in my carryon bag . I was told the it will directly go yo ho chi minn cuyt but I was told that by the Vietnams airline desk that’s not there I’m 10 hours behind my scheduled flight and looks like I I’m going without baggage. I don’t have a chance of catching ..

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

The flight didn’t happen because they apparently lost my check in and wouldn’t let me board.

Access to movies was rather confusing. Apart from that, I have no complaints.

The agents at the Kelowna YLW airport were really grumpy. Same with oversized baggage person. Staff on the plane were great.

As someone who never flies WestJet unless there is no other viable option I have to give this crew credit where credit is due. Extremely well done everyone.

Flight left on time. The crew was very friendly. I had to buy a proper meal. Small cookie and a drink just doesn’t cut it for a 4.5 hours flight.

Experience was good, the wifi hook up is somewhat tough

I will not be flying with westjet again. I was uncomfortable in my seat. The position made my back hurt so bad. My wife was able to fit the seatbelt around her with out an extension but was unable to put the tray table down or fit in the seat for that matter. Our bag was smashed and I spent two hours trying to fill out the application for a damaged bag before I gave up. The 80 photos I took would not work and nothing telling me the format to upload them as.. I made the mistake of unpacking the bag before taking photos so no claim for me. Next trip to Canada I will have to use air Canada.

They lost my bag. Hopefully it will be here tomorrow.

My luggage was damaged 1 wheel was out I can't find it nowhere

Took 3 hours to check in and drop off our suitcases. Half of the passengers were still in line by boarding time. The computer systems and staff were very slow. Staff were also disorganized and kept allowing later flights to skip lines. Suitcases were piling on that several other passengers didn't get their suitcases. Then, we were sitting in the plane for 2 hours and were told that the flight was overbooked. We missed our connecting flight and had to fly the following day but with a stop over. Good thing ONE WestJet customer rep was pleasant and actually knew how to do her job when we wanted to rebook to a direct flight. Thank you to Kim at Toronto airport. Terrible experience at PUJ. Won't go back to Dominican Republic.

It was a nice and smooth trip. Gave a friendly environment throughout the journey.

Meal and drink service was good. Old plane with old business class seats were quite disappointing

Flight itself was not bad at all. However: my checked bag (checked in Calgary) did not make it onto this flight as I found out after I landed at EWR. I still don't have it but it appears that it is on its way to me.

Flight and attendance were very good we had 2 hour delay that took the shine of it

The seat design in the premium economy section leaves virtually no room under the seat to store a bag or purse. Other than that, it was a great flight. Arrived early.

The flight was delayed, but not for weather. We landed over 3hrs later than planned.

The stag were helpful, kind and liked the passengers. The plane was pristinely clean! Great flight!

My flight was delayed more than once, but Air Canada updated us regularly. Friends on other airlines had much worse experiences.

Got denied my flight was told on Google that Air Canada was supposed to book me a flight back home because I never was able to go to my destination. They did not help me whatsoever. I had to book a whole new flight for that reason I would write this is zero

Terrible…. Reported missing luggage’s with injectable meds that needed refrigeration. Yet, delivery could not be expedited. Luggage’s were delivered 5 days after arrival. The meds were useless as ice pack had melted. So disappointed!!!

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

Information on your arrival and departure airports