YYZ - SEA

C$ 183 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 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.
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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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Cheap Flight Deals 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.

Recent round-trip flight deals from Pearson Intl to Seattle

KAYAK's recommended round-trip deals from the most popular airlines that fly from Pearson Intl to Seattle.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
8:00 p.m. - 8:43 a.m.YYZ-SEA
15h 43m1 stop
12:30 p.m. - 6:43 a.m.SEA-YYZ
15h 13m1 stop
C$ 284
Find Deal
Mon, 7 Apr - Tue, 15 Apr
8:00 p.m. - 8:43 a.m.YYZ-SEA
15h 43m1 stop
8:56 p.m. - 6:43 a.m.SEA-YYZ
30h 47m1 stop
C$ 316
Find Deal
Mon, 7 Apr - Mon, 14 Apr
9:00 a.m. - 8:28 p.m.YYZ-SEA
14h 28m2 stops
2:05 p.m. - 5:51 a.m.SEA-YYZ
12h 46m2 stops
C$ 402WestJet
Find Deal
Thu, 5 Jun - Mon, 9 Jun
8:00 a.m. - 12:58 p.m.YYZ-SEA
7h 58m1 stop
7:05 a.m. - 9:03 p.m.SEA-YYZ
10h 58m2 stops
C$ 410WestJet
Find Deal
Wed, 14 May - Thu, 12 Jun
12:00 p.m. - 7:37 p.m.YYZ-SEA
10h 37m1 stop
7:20 a.m. - 7:48 p.m.SEA-YYZ
9h 28m1 stop
C$ 415Air Canada
Find Deal
Sat, 3 May - Sat, 10 May
8:00 a.m. - 2:23 p.m.YYZ-SEA
9h 23m1 stop
6:00 a.m. - 1:57 p.m.SEA-YYZ
4h 57mdirect
C$ 422Air Canada
Find Deal
Wed, 9 Apr - Mon, 14 Apr
4:45 p.m. - 7:05 p.m.YYZ-SEA
5h 20mdirect
7:20 a.m. - 3:00 p.m.SEA-YYZ
4h 40mdirect
C$ 428Alaska Airlines
Find Deal
Thu, 10 Apr - Mon, 14 Apr
7:20 p.m. - 9:41 p.m.YYZ-SEA
5h 21mdirect
6:00 a.m. - 1:57 p.m.SEA-YYZ
4h 57mdirect
C$ 461United Airlines
Find Deal
Thu, 10 Apr - Wed, 16 Apr
10:15 a.m. - 6:07 p.m.YYZ-SEA
10h 52m1 stop
11:45 p.m. - 3:46 p.m.SEA-YYZ
13h 01m1 stop
C$ 462United Airlines
Find Deal
Wed, 16 Apr - Mon, 21 Apr
4:45 p.m. - 7:05 p.m.YYZ-SEA
5h 20mdirect
7:20 a.m. - 3:00 p.m.SEA-YYZ
4h 40mdirect
C$ 507Alaska Airlines
Find Deal
Tue, 15 Apr - Mon, 21 Apr

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 Sundays 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$ 385 (return) on average. On the other hand, the most expensive months are May and June, where the average cost of round-trip tickets is C$ 700 and C$ 682 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.
No, with an average price for the route of C$ 2,009, prices are generally cheapest when you fly direct.

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 season

January

High season

August

Cheapest flight

C$ 183
Best time to beat the crowds (28% less expensive on average)
Most popular time to fly (11% 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$ 128 for a one-way ticket and C$ 198 for a round-trip.

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

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

  • 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$ 565 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$ 620 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.

See more FAQs

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$ 524 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, +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, +2 more

Air Canada,Air Tahiti Nui, +3 more

See more nonstop flights

Direct returns

Seattle/Tacoma Intl to Toronto Pearson 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, +4 more

Air Canada,Air Tahiti Nui, +5 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, +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 9757 reviews
8.2Boarding
7.1Food
7.9Comfort
7.1Entertainment
8.5Crew
Airline reviews

The flight attendants on this flight were fabulous! I flew with my two kids and it was their first flight ever. One attendant in particular learned it was my kids first flight so she took extra care of them. She brought them some wings and extra cookies which made the experience positive and memorable. Thank you so much!

10.0 ExcellentAnonymous, Mar 2025ABQ - SEA
Read more Alaska Airlines reviews

The flight attendants on this flight were fabulous! I flew with my two kids and it was their first flight ever. One attendant in particular learned it was my kids first flight so she took extra care of them. She brought them some wings and extra cookies which made the experience positive and memorable. Thank you so much!

Have I received a refund yet? They wouldn’t let me on the airplane it took hours. I lost my bag that told me what I needed to do to bring the dogs, and then they kept changing their minds.

Flying in both directions across country the gate designated on my boarding pass was wrong. From w to e across the country the passenger next to me coughed the entire way.

Even though we checked in, checked bags, and went through security, I was told at the gate that I hadn’t checked in. I was pulled aside and had to verify my identity yet again. Otherwise, the flight was fine.

Everything smooth (including the landing) and on time. Easy. Thanks.

Flight was late creating alot of stress getting to my connecting flight which was also delayed - fortunately worked in my favor, but made for a very late arrival time.

Great service, great options, flight was bumpy so didn't get second beverage service and everything was communicated very clearly and courteously. No notes: everyone did great! Also loved the fun Hawaiian drink options (non-alcoholic).

I understand bottom line but..... You have to get more room in the seats. Why not give full cans for the drink service, little things go a long way. Thank you

Didn’t like anything. Alaska boarding process takes too long and is poorly managed. Flight crew unorganized and too lax not very professional. I fly very frequently (weekly) and this as the worst overall trip I have ever taken.

Very nice staff, plane was delayed-they gave some snacks about 30 min after delay due to mechanical issues (which I appreciate them checking the plane)

Flights on time. .Ride was as comfortable as can be expected in steerage. Luggage arrived at destination. Attendants were fairly friendly.

Great staff. Wifi is terrible. Signing up for skylines is a painstaking process. Had to call customer service just to get my flight itinerary and confirmation sent to me. Consistent delays. A well staffed company that is run so poorly. Upper management needs to be renewed.

The WiFi didn't seem as fast as it normally is

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

The crew was wonderful and attentive. The seats near exit row were restrictive. Offer healthy snacks please

Delta is a premier airline so my expectations are most always met.

Friendly and helpful crew. Had no issues at all other than the St Thomas airport is woefully small, so allow plenty of time. Flight was pretty smooth and we arrived earlier than planned.

Friendly crew, quick boarding. We even arrived a few minutes earlier than our original flight plan. No onboard screens, but it’s a relatively short flight so it’s not really an issue.

Seats are much much more comfortable than United, which is what I usually fly

Zero updates from the pilots for 30 minutes in the tarmac

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.

headphone jack didnt work for the first flight and not much variety

The seats on this flight were almost roomy enough to be the basic amount needed for human existence. I think my favorite part of this flight was it landed at an A gate, which was the most palatial part of Sea-Tac I've ever seen - a massive improvement from the S gates.

The seats on this flight were almost roomy enough to be the basic amount needed for human existence.

Plane 3 hours late. Missed connection. No help from gate staff. App horrible. Lost connection repeatedly. No service desk. Finally got help from young girl driving cart.

Not as good as expected Air Can needs to improve totally rated on internet as worst

The flight was delayed, it took longer than anticipated because of weather, and they broke my luggage.

Everything was good. Flight was on time, luggage pickup was quick. The staff were great. Could not ask for anything more.

lots of delays the crew were unclear about where to pick up my carry-on, which they took from me to check in on the plane.

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.

Will never book through you again. Very disappointed in the notices and action taken or provided when planes are rescheduled, enough to cause missed connections

Lost my luggage. Filed a report and there is no response. Received a phone call from another airline that said they had the bag and they did not know what to do with it

Very good over all , would have been nice to have entertainment on the flight

Absolutely the worst airline I have ever taken. They lost my baggage and told me my bag tags had been cancelled. When my bags arrived days later I had to pick them up at 3:15 am. My return flight was delayed another 6 hours and they broke my bag. Westjet does nothing to try and make it a better customer experience and all the customers services representatives I spoke with were useless and incompetent. Never flying westjet again.

Easy self checkin and baggage drop. No in seat entertainment, but wifi and app worked well

it's all good nothing you can do make better 😌

Single flights to Cancun purchased through third-party, initially had issues printing luggage labels with the lady at the airport Pearson… Was super friendly and assisted quickly despite being very busy

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.

The flight was cancelled and we had to rebook on Porter to make our cruise the next day. Air Canada has not compensated. We won’t be flying with them again. This is the second time this has happened. Also the return flight was delayed 2 hours who knows why.

Separated me and my wife and wife’s sister in far apart different seats even though I booked them all together. Just scams after scams to make us pay more. Worst airline

If you want your flight to get delayed constantly for 13+ hours and given a 10 dollar food voucher the. I would say take air canada. Worst experience ever.

My flight was cancelled and I was left to figure out where to find a hotel, something to eat and how to get a new flight at 11:30pm. Wasted a day. Thanks, Air Canada!

flight was delayed 6 hours for weather, then cancelled because of the crash in toronto, but none of the links to cancel or rebook my flights are working

They kept changing the gate (6 times in 30 minutes) and then left us on the plane for 4 hours before departure. Likely was the storm, which is understandable, but the lack of communication and the e constant running between gates at opposite ends of the airport really threw me and my friend for a loop.

Legitimately everything about this flight was awful, was also so delayed I never want to use air Canada again

Terrible all around. Flight was late and airplane was very uncomfortable. The crew were unhelpful and hid in the back. Did zero work. No entertainment.

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

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