YYZ - SEA

C$ 179 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 4/7. 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 Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Toronto to Seattle.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Toronto to Seattle.
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Flights 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

Wed, 17 Sep - Wed, 24 Sep
WestJet Logo
12:00 p.m. - 8:29 p.m.YYZ-SEA
11h 29m2 stops
WestJet Logo
1:50 p.m. - 5:51 a.m.SEA-YYZ
13h 01m2 stops
C$ 299WestJet
Find Deal
Sat, 16 Aug - Wed, 27 Aug
WestJet Logo
9:00 a.m. - 7:14 p.m.YYZ-SEA
13h 14m2 stops
WestJet Logo
1:50 p.m. - 5:51 a.m.SEA-YYZ
13h 01m2 stops
C$ 301WestJet
Find Deal
Fri, 7 Nov - Sun, 16 Nov
Air Canada Logo
7:30 p.m. - 9:56 p.m.YYZ-SEA
5h 26mdirect
Air Canada Logo
7:30 a.m. - 3:09 p.m.SEA-YYZ
4h 39mdirect
C$ 324Air Canada
Find Deal
Fri, 29 Aug - Tue, 28 Oct
Alaska Airlines Logo
4:45 p.m. - 7:07 p.m.YYZ-SEA
5h 22mdirect
Alaska Airlines Logo
7:55 a.m. - 3:35 p.m.SEA-YYZ
4h 40mdirect
C$ 325Alaska Airlines
Find Deal
Sat, 12 Jul - Tue, 15 Jul
United Airlines Logo
10:05 a.m. - 12:56 a.m.YYZ-SEA
17h 51m1 stop
United Airlines Logo
12:20 a.m. - 3:46 p.m.SEA-YYZ
12h 26m1 stop
C$ 366United Airlines
Find Deal
Sat, 19 Jul - Thu, 24 Jul
United Airlines Logo
9:00 a.m. - 11:59 p.m.YYZ-SEA
17h 59m1 stop
United Airlines Logo
5:00 a.m. - 10:36 p.m.SEA-YYZ
14h 36m1 stop
C$ 368United Airlines
Find Deal
Sat, 23 Aug - Sat, 30 Aug
Delta Logo
5:43 p.m. - 10:15 p.m.YYZ-SEA
7h 32m1 stop
Delta Logo
5:30 a.m. - 4:38 p.m.SEA-YYZ
8h 08m1 stop
C$ 369Delta
Find Deal
Mon, 11 Aug - Tue, 26 Aug
Air Canada Logo
10:50 p.m. - 9:21 a.m.YYZ-SEA
13h 31m1 stop
Air Canada Logo
2:55 p.m. - 5:34 a.m.SEA-YYZ
11h 39m2 stops
C$ 373Air Canada
Find Deal
Sun, 31 Aug - Thu, 18 Sep
Alaska Airlines Logo
4:45 p.m. - 7:07 p.m.YYZ-SEA
5h 22mdirect
Alaska Airlines Logo
7:16 a.m. - 3:00 p.m.SEA-YYZ
4h 44mdirect
C$ 387Alaska Airlines
Find Deal
Thu, 10 Jul - Fri, 8 Aug
Delta Logo
5:45 p.m. - 11:59 p.m.YYZ-SEA
9h 14m1 stop
Delta Logo
5:30 a.m. - 4:40 p.m.SEA-YYZ
8h 10m1 stop
C$ 392Delta
Find Deal
Expert advice

Expert advice for your flight from Pearson Intl to Seattle

 
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 a 20-minute baggage guarantee; receive bonus miles if delayed.


Alaska Airlines provides free texting on Wi-Fi equipped flights, enhancing connectivity.

Air Canada

Air Canada offers priority boarding for Business Class and elite status passengers, enhancing travel efficiency.


Air Canada’s Wi-Fi is available on select flights; check availability five days before departure.

Read more about Air Canadaby Stefanie Waldek
Airports
YYZ

Use the free YYZ Express service to schedule security checkpoint access up to 72 hours before departure, minimizing wait times.

Read more about YYZby Mark Stachiew
SEA

Take the Link light rail from SEA to downtown Seattle in about 40 minutes, a cost-effective alternative to taxis or ride-hailing.

Read more about SEAby Harriet Baskas
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
Useful Info

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.

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 Sundays 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 Tuesdays.

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$ 368 (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$ 615 and C$ 597 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 1 stop layover the cheapest option at C$ 1,081 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 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.


Good to know

Low seasonMarch
High seasonAugust
Cheapest flightC$ 179
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly (8% 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 3 days, the lowest price for a flight from Toronto Pearson Intl Airport to Seattle was C$ 131 for a one-way ticket and C$ 219 for a round-trip.

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

    Air Canada, Alaska Airlines, United Airlines, Delta, and WestJet 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?

    Star Alliance, and oneworld are the airline alliances operating flights between Toronto Pearson Airport and Seattle, with Star Alliance 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$ 502 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of C$ 516 and an overall rating of 8.0.

  • 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$ 313 or less one-way and C$ 553 or less round-trip.

Prefer to fly direct from Toronto Pearson Airport to Seattle?

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,Air Tahiti Nui,Alaska Airlines, +2 more

Air Canada,Air Tahiti Nui, +3 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, +2 more

Air Canada,Air Tahiti Nui, +3 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, +2 more

Air Canada,Air Tahiti Nui, +3 more

Sunday

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

Air Canada,Air Tahiti Nui, +4 more

See more nonstop flights

Direct returns

Seattle/Tacoma Intl to Toronto Pearson Intl

Monday

Air Canada,Air Tahiti Nui,Alaska Airlines, +2 more

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

Air Canada,Air Tahiti Nui, +5 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, +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
See more nonstop flights

Top 5 airlines serving 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.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.1Food
7.1Entertainment
8.1Boarding
7.8Comfort
8.5Crew
Airline reviews

The crew the employees were friendly and excellent. There was a problem with the plane and they had workers there immediately working on it. They made sure the people that had immediate connects knew what gates they had to get to and had them leave the plane first. Very thoughtful.

10.0 ExcellentHelen, Jun 2025BLI - SEA
Read more Alaska Airlines reviews

The crew the employees were friendly and excellent. There was a problem with the plane and they had workers there immediately working on it. They made sure the people that had immediate connects knew what gates they had to get to and had them leave the plane first. Very thoughtful.

We waited over an hour for our luggage to arrive at the carousel in Seattle.

Like the friendliness of the crew, each flight had a very very drunk person next to me and the last flight had a very obese man pushing me into the aisle while the crew kept ending up hitting me in the shoulder with the beverage carts.

Flight was about 30 minutes delayed. All staff were friendly and professional while keeping us updated.

My screen was hard to change channels….seemed it was worn out….i just gave up and read a book I brought

Booked a first class ticket from Anchorage to Seattle but was denied complimentary access to Alaska Lounge as our 1500 mile flight wasn’t long enough’

We were lucky to be seated in an upgraded row and received free drinks!!

Everyone was very helpful. My only critique was the very hard landing in Seattle. We felt the G force.

It was absolutely terrible due to the mother and her two children sitting across from us. The 2.5 year old jumped up and down on the tray table. Every time the kid screamed the mom would grab the kid and scream even louder into his face. Horrible flight. The mother stayed on her phone playing while the kids were so destructive to others hanging over seats, she never once tried to comfort or discipline them. She never once said you cannot jump on tray table. Definitely the worst flight ever. It was my first time with Alaska Airlines.

It was great. There was legroom. The food I ordered was creative and flavorful. The crew was kind and fun. Definitely would fly with them again.

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Amazing flight! I have never noticed the uniforms of the attendants before in twenty years of flying except today when one female had the most amazing dress on. It was beautifully designed and showed she was in charge. I never dreamed I would google who designed Delta uniforms . The ultimate compliment is when another woman admires your outfit. . I hope your designer puts it on the market

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

My flight was 6 pm 6/6. Every hour they delayed it again - air condition issues then no pilot then the crew had worked too many hours and cancelled the flight at 11 pm. Sent customers to NJ a 45 minutes uber ride to a hotel. Had to be back by 5 am for a 7 am flight and again no pilot etc with another three hours of delays.

The entertainment and wifi mostly didn't work on this flight.

Boarding was tough as we had to take a bus out to the plane and walk up a lot of stairs. Difficult with heavy carry-ons that said I got an entire empty row of seats, which was excellent for an international flight. Food was very mediocre but happy with the comfort so not complaining.

Terrible entertainment system - kept freezing and audio kept cutting out. Snacks were mediocre at best for a 5 hour flight.

The check in and bag drop off for Sky Priority members is slow. The Clear security was also slow - a TSA issue.

Delta is better for short flights and very low need for customer service. Avoid for longer flights

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

Airbus plane, nice and polite staff, entertainment even as it was a short flight.

Very nice and clean plane. Transit time between flights was tight though

Our flights got changed from United to Air Canada and our purchased seats did not get transferred so we had to pay for seats twice. I brought it up with Air Canada and they stated I had to go back and chase it with United. The united seats were $21 Canadian each and Air Canada were $56 each so we have paid $77 for each seat. Very unhappy

So far so good but food and entertainment are not available for this flight

leg space better than expected. two washrooms for one plane isn't enough.

Plane temperature was comfortable (not to hot) when boarding and waiting for takeoff.

Michael, our FA was very attentive, even finding me a chocolate brownie from economy class when the dessert selections were all dairy based. ( intolerant, not allergic so don’t usually need to order dairy free)

We tried to upgrade to economy premium but were told this was not possible as we had booked through United Airlines (and Air Canada was operating the flight). This seemed silly given there was ample space in economy premium. Additionally, we had to wait almost 1.5 hours upon arrival to taxi to the gate. Otherwise, the crew were very pleasant and passengers were friendly.

It was my first time with United Airlines and I would say it was very good experience and best of all the flights were on time. Will definitely fly with United Airlines next time.

Not the greatest experience everything was pretty mediocre. My seat was by the washroom in the aisle and was not located well as everyone past each other people were right in my seat and space.

The small prop plane was crowded and the overhead luggage storage is a smaller than on the jets. Other than that, the crew was good, the flight was on time and the landing was smooth.

There was a medical emergency that the crew handled very well. There was no “entertainment” of any sort-no movie/music/whatever. Food was typical of airlines: mediocre.

Late departure, so I missed connection in Detroit. But Delta gave me a great hotel & breakfast. Just sorry I could not get anything from my checked baggage.

Crew was friendly. Lost our luggage and told us it’d be in later in the evening of the day we returned. It was not. Still after 5 days have not received it.

Internet on both flights was sketchy. Thus in flight entertainment was non- existent on MN - Balrimote leg.

We never had an experience they canceled the flight and they did not offer us an alternative flight. I had to book one on my own expense. They offered us food voucher and we could not use them at the airport it kept saying not attached to an existing flight. The people at the counter were rude and cold and they did not care about our situation

It took 30 minutes to check in with the Westjet rep. They didn’t have enough seats and she needed to make a call… I am always “randomly” selected to be checked at security. Their “randomly “ selection system may need some updating. They treat people like criminals. It is not appropriate behavior.

Found the seats very crowded—too close together ! And waited a long time for our luggage All staff at both ends were excellent!!!

Flight cancelled and Kayak switched our return flight to a red eye. Ridiculous.

Somebody either kayak or Air Canada booked my flight under my preferred name Betty instead of my legal name and I almost was denied boarding my flight

The ground staff was so rude in Toronto airport ...very rude and did not answer simple questions, and made me look like a fool. Very rude ground staff.

My flight got delayed 5 times and then got cancelled eventually, I had to get a hotel and uber and pay for food for an extra night without any plans. It was a horrible experience, instead of Air Canada, I was flying with United .

I had a nice flight with free wifi. So I was able to message family members and stream music during my flight, which made the trip go by fast. I also enjoyed flying on there Airbus A220. The plane looked very new and it also got up to speed fast down the runway and didn't need much runway to get airborne.

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

Boarding was challenging as we had to use the stairs from the tarmac. Stairs are okay but a roller bag makes it challenging.

Ensure prepaid food arrangements are appropriately understood by flight crew of who purchased and who did not

All was fine. Weather was a bit stormy, but nothing kayak can do about that! 😊

I paid for a comfort class seat and was seated in economy.

My plane was cancelled and had to be rebook for the evening was not happy.

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

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