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SEA - YTO

$79 Find cheap flights from Seattle to Toronto

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 Toronto departing on 10/7. 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
0 bags
Sat 6/29
Sat 7/6

Search hundreds of travel sites at once for deals on flights to Toronto

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Toronto.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Toronto.
In the last 7 days travelers have searched 42,686,544 times on KAYAK, and here is why:

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Cheap flight deals from Seattle to Toronto (SEA-YTO)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Toronto 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 and deals for you by selecting your travel dates.
Choose your dates
9:49 am - 6:35 amSEA-YYZ
17h 46m1 stop
12:20 pm - 8:32 amYYZ-SEA
23h 12m1 stop
Tue, Jun 11 - Tue, Jun 18
9:49 pm - 6:35 amSEA-YYZ
29h 46m1 stop
1:25 pm - 8:09 pmYYZ-SEA
9h 44m1 stop
Mon, Jun 10 - Wed, Jun 19
9:49 pm - 6:35 amSEA-YYZ
29h 46m1 stop
8:00 pm - 10:05 pmYYZ-SEA
29h 05m1 stop
Mon, Jun 10 - Wed, Jun 12
6:15 pm - 6:06 amSEA-YYZ
8h 51m1 stop
1:30 pm - 8:21 pmYYZ-SEA
9h 51m1 stop
$361WestJet
Find Deal
Sat, Aug 24 - Tue, Aug 27
7:00 am - 5:28 pmSEA-YKF
7h 28m1 stop
6:15 am - 2:48 pmYKF-SEA
11h 33m2 stops
$375WestJet
Find Deal
Tue, Sep 17 - Fri, Sep 20
11:40 am - 7:20 pmSEA-YYZ
4h 40mnonstop
8:30 am - 2:34 pmYYZ-SEA
9h 04m1 stop
$472Air Canada
Find Deal
Tue, Jul 30 - Wed, Aug 21
6:50 am - 2:30 pmSEA-YYZ
4h 40mnonstop
3:40 pm - 6:00 pmYYZ-SEA
5h 20mnonstop
$490Alaska Airlines
Find Deal
Mon, Jun 10 - Wed, Jun 19
12:30 am - 11:52 amSEA-YYZ
8h 22m1 stop
11:00 am - 3:41 pmYYZ-SEA
7h 41m1 stop
$491United Airlines
Find Deal
Mon, Jul 29 - Tue, Aug 20
7:00 am - 2:30 pmSEA-YYZ
4h 30mnonstop
3:40 pm - 6:00 pmYYZ-SEA
5h 20mnonstop
$497Alaska Airlines
Find Deal
Wed, Jun 26 - Wed, Jul 3
7:40 am - 7:49 pmSEA-YTZ
9h 09m1 stop
10:20 am - 9:25 pmYTZ-SEA
14h 05m1 stop
$545Air Canada
Find Deal
Sat, Aug 10 - Wed, Aug 21

Flights from Seattle to Toronto - Travel Insights & Trends

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

What is the cheapest Seattle to Toronto flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for one-way flights from Seattle to Toronto.
Our data shows that the cheapest route for a one-way flight from Seattle to Toronto cost $134 and was between Seattle and Toronto Pearson Intl Airport. On average, the best prices are found if you fly this route. The average price for a return flight for this route is $197.

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

The average price of all flights from Seattle to Toronto clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to Toronto on a Friday and more expensive on a Sunday. On your return trip to Seattle, you should consider flying back on a Tuesday, and avoid Fridays for better deals.

What is the cheapest month to fly from Seattle to Toronto?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Seattle to Toronto, 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 is November, where tickets cost $516 on average. On the other hand, the most expensive months are December and March, where the average cost of tickets is $634 and $633 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Seattle to Toronto, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Seattle to Toronto, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 76 days before departure.

Which airlines provide the cheapest flights from Seattle to Toronto?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, WestJet offered the best one-way deal for that route, at $158. KAYAK users also found Seattle to Toronto round-trip flights on WestJet from $361 and on Delta from $456.

Which airlines fly non-stop between Seattle and Toronto?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Seattle to Toronto.
There are 2 airlines that fly nonstop from Seattle to Toronto. They are Air Canada and Alaska Airlines. The cheapest airline for this route is Alaska Airlines, with the best one-way deal found costing $202. On average, the best prices for this route can be found at Alaska Airlines.

How many flights are there between Seattle and Toronto per day?

Each day, there are 3 nonstop flights that take off from Seattle and land in Toronto, with an average flight time of 4h 39m. The most common departure time is 6:00 am and most flights take off in the morning. Each week, there are 21 flights and there are the same amount of flights each day 3.

Which cabin class options are there for flights between Seattle and Toronto?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 3 cabin class options for the route. These are Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Seattle to Toronto take?

A direct flight to Toronto will take on average 4h 30m to travel the 2,065 miles flying distance from Seattle.

What’s the earliest departure time from Seattle to Toronto?

Early birds can take the earliest flight from Seattle at 6:50 am and will be landing in Toronto at 2:30 pm.

What’s the latest departure time from Seattle to Toronto?

If you prefer to fly at night, the latest flight from Seattle to Toronto jets off at 11:10 pm and lands at 6:48 am.

Good to know

Low season

February

High season

August

Cheapest flight

$79
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 0% lower on average.
Flight from Seattle to Toronto Pearson Airport

When to book flights from Seattle to Toronto

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

  • What is the cheapest flight from Seattle to Toronto?

    In the last 3 days, the lowest price for a flight from Seattle to Toronto was $79 for a one-way ticket and $277 for a round-trip.

  • Do I need a passport to fly between Seattle and Toronto?

    Yes

  • Which airports will I be using when flying from Seattle to Toronto?

    When flying out of Seattle you will be using Seattle/Tacoma Intl. You will be landing at one of these airports: Toronto Kitchener-Waterloo, Toronto Island, or Toronto Pearson Intl.

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

    All the following airlines offer inflight Wi-Fi service on the Seattle to Toronto flight route: Air Canada, Alaska Airlines, United Airlines, Lufthansa, Air France, and WestJet Encore.

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

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

  • Which airline alliances offer flights from Seattle to Toronto?

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

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

    There are nonstop flights from Seattle to Toronto on a daily basis.

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

    The two airlines most popular with KAYAK users for flights from Seattle to Toronto are Alaska Airlines and Delta. With an average price for the route of $483 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 $584 and an overall rating of 8.0.

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

    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.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Toronto from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Toronto?

    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 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?

    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 from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from Seattle to Toronto

  • Looking for a cheap flight? 25% of our users found flights on this route for $247 or less one-way and $506 or less round-trip.

Prefer to fly non-stop from Seattle to Toronto?

Find which airlines fly direct from Seattle/Tacoma Intl to Toronto, which days they fly and book direct flights.

Nonstop departures

Seattle/Tacoma Intl to Toronto

Monday

Air Canada, Alaska Airlines, Brussels Airlines, +2 more

Air Canada, Alaska Airlines, +3 more

Tuesday

Air Canada, Alaska Airlines, Brussels Airlines, +2 more

Air Canada, Alaska Airlines, +3 more

Wednesday

Air Canada, Alaska Airlines, Brussels Airlines, +2 more

Air Canada, Alaska Airlines, +3 more

Thursday

Air Canada, Alaska Airlines, Brussels Airlines, +2 more

Air Canada, Alaska Airlines, +3 more

Friday

Air Canada, Alaska Airlines, Turkish Airlines, +2 more

Air Canada, Alaska Airlines, +3 more

Saturday

Air Canada, Alaska Airlines, Brussels Airlines, +2 more

Air Canada, Alaska Airlines, +3 more

Sunday

Air Canada, Alaska Airlines, Brussels Airlines, +2 more

Air Canada, Alaska Airlines, +3 more

See more direct flights

Nonstop returns

Toronto to Seattle/Tacoma Intl

Monday

Air Canada, Alaska Airlines, Brussels Airlines, +1 more

Air Canada, Alaska Airlines, +2 more

Tuesday

Air Canada, Alaska Airlines, Brussels Airlines, +1 more

Air Canada, Alaska Airlines, +2 more

Wednesday

Air Canada, Alaska Airlines, Brussels Airlines, +1 more

Air Canada, Alaska Airlines, +2 more

Thursday

Air Canada, Alaska Airlines, Brussels Airlines, +1 more

Air Canada, Alaska Airlines, +2 more

Friday

Air Canada, Alaska Airlines, Brussels Airlines, +1 more

Air Canada, Alaska Airlines, +2 more

Saturday

Air Canada, Alaska Airlines, Brussels Airlines, +1 more

Air Canada, Alaska Airlines, +2 more

Sunday

Air Canada, Alaska Airlines, United Airlines, +1 more

Air Canada, Alaska Airlines, +2 more

See more direct flights
See more direct flights

Top 5 airlines serving from Seattle to Toronto

 
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 Toronto? 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 9192 reviews
8.6Crew
7.9Comfort
8.2Boarding
7.3Entertainment
7.3Food
Airline reviews

Cabin crew very friendly and pleasant. Flight left late but we didn't know why. Alaska Airlines app was not user friendly -- app wouldn't let us upgrade our seats, but no indication if flight was full. We wound up having to call the airline to request an upgrade and we were told none was available. Waste of time. Baggage retrieval was easy.

8.0 ExcellentElaine, May 2024SEA - PHL
Read more about Alaska Airlines reviews

Cabin crew very friendly and pleasant. Flight left late but we didn't know why. Alaska Airlines app was not user friendly -- app wouldn't let us upgrade our seats, but no indication if flight was full. We wound up having to call the airline to request an upgrade and we were told none was available. Waste of time. Baggage retrieval was easy.

The boarding gate is literally just an aisle to the concourse. There is no seating and it's shared with several other airlines. It's crowded, hot, and standing-room only. It's difficult to hear gate announcements over the PA system with too many other carriers crammed into a small space. I've enjoyed flying AA in the past on the west coast, but the BNA single gate experience is horrendous! Never again from BNA to SEA with AA.

It was a partial full flight. But even with a spare seat it was hard to get comfortable More on me being a wide body probably

Our flights using Alaska Airlines went great! All of the flight attendants were very friendly. Big shout out to the pilots for getting us to and from our destinations safely!

I can’t complain. Perhaps passing out headphones, but it was on me to bring my own since I could have used some for my personal device.

I liked only the crew. The flyght was too much fast, faster than it should be, on 20 min faster, but not safer, I experienced on myself astranautic overload from suddenly appearing in the sky and all the vibrations of the turbines, because I had my place at the level of the wings. Pregnant woman should not be seated on the level of the wings with all turbines, pregnant woman should be offered to charge place to seat closer to front or in the back, but not at the level of all the turbines. Vibrations of turbines are not healthy for pregnancy. I hold all the flight my belly in my hands to avoid miscarriage. If it would be longer flying distances, I could have miscarriage with Alaskan airlines.

I didn't have food or use entertainment, so those evaluations are invalid.

I do not feel the priority seating I paid for was was adequate for the cost. there was no difference from coach on any other airline, and it was very uncomfortable

First flights on Alaska Air, and I will go out of my way to fly them whenever I can in the future. An incredible experience, above and beyond any other airline.

It was warm on the plane. Perhaps the people who were coughing quite often should be encouraged to wear a mask?! It was a long 4 hours.

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

Had a broken tray in business class. Crew just shrugged it off.

Everything was great except for the seat. The backrest would not stay in the upright position.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Mi primera conexión se retrasó por lo cual perdí mi segunda conexión la cual salió adelantada

Crew was not friendly when I went to request a seat change.

There were choices for the snacks. Good choices and tasty lunch and breakfast as well.

The flight crew was amazing. I’m very tall and they moved me to an exit row unsolicited!!! Amazing service.

Keep better track of bags. Not sure how they got lost. Also not sure why it took two weeks for us to get them back. Had to buy a bunch of necessities because they were packed.

They lost our luggage and didn’t return it until 15 days AFTER we got back.

food worker strike caused lack of service. I know, not your fault but a bit of a inconvenience.

The staff on the WestJet flight were friendly and helpful. The flight was smooth and we arrived 30 minutes ahead of time.

not as spartan as an air Canada flight, less comfortable / no in-flight screen as compared to similar priced Air Transat flight. Crew Cabin were professional and approachable. They got the job done, safe flight, on time despite delay in take off.

There was no entertainment and no announcement till well after I and others asked about it, and no "compensation" (like a free snack)

4 hour delay, lost our bags, staff was loud and it was an overnight flight

Entertainment was the only issue. I did not have app & not equipped to watch movie on my phone. Used to other carriers with access to a screen for viewing. Other than that, everything was fine.

Great flight. Pilot was able to fully make up the 42 minute late arrival of the aircraft for an on time arrival in Toronto.

Westjet delayed then rebooked us on flights for economy class when we paid for business class and now need a refund for fare difference and they aren't getting back to us

Fine. Though no food or entertainment so the survey needs to be updated with those options.

Backpack should NOT allowed put in the flight bin , only put it under the seat. I can't find space put my carry on luggage!!! and I pay for it ! that was very bad experience

Standard flight experience, but there is only power at the seat to row 20 on the aircraft, on my initial check in it did not say that was the case

I feel like they have upgraded the app since I last flew United and I found it to be super helpful. I had stopped flying United unless absolutely necessary and my experience on this trip indicates they have been working hard to improve their services.

The ride was good but no food ot entertainment hence, it was just over an hour flight.

Positive: Entertainment via phone on the short was great and my first time. Good food and wine and head phones for free. Negative: Seat hardly reclined on the long flight. Breakfast was an egg with a bun. No egg choices and rather have something sweet like bun/jam and Youghurt.

Aircraft has better leg room than any of United's larger planes. We had requested mobility assistance for this and related flights. United's response to all was superb.

No snacks served! Seating in the kast row in uncomfortable.

By in large it was a good experience. The flight crew was great and that's the most important to me. Boarding was fine.

Flight was fine, it was delayed but only 30 minutes, staff were efficient, lady making announcements at LAX was really hard to understand but the rest were great.

Unable to initiate refund/reschedule the ticket #worst experience #lost 900$

Flight was delayed for almost 3 hours. Communication of gate change was poor. Email and screen said one gate and it was a different gate from that. Gate changed first to 64 B and then to 64 C. Originally it was 68B. 64C was not communicated properly!

This was a red eye return, so I doubt there would be anyway to make it better. Other than adding beds.

Direct nonstop flight was great. Flight was delayed and the crew announced a 2h delay on the sound system. 30 min or so later I hear my name on the sound system for immediate board. Several other passangers were late too. Reason: The crew incorrectly announced a 2h delay when in reality they meant a new boarding time at 2pm.

Flight was on time early arrival better entertainment good staff.everything was excellent

Excellent host on board. Not so friendly check-in staff. Older plane with no food or entertainment due to short flight. Friendly captain and crew.

I don’t think there was entertainment? No mention of it. It was a good flight. Only complaint was my seat cushion was not attached and kept slipping.

It took 66 hours to get from Seattle to Tel Aviv. As a minor, I was left for more than 12 hours in Toronto and Frankfurt without hotel and food vouchers. It took 5 layovers. It was insane and not okay

Flew SEA-CA, then CA-NRT. First flight was short but very uncomfortable, dirty, and had very small overhead storage space. The seats and fans were not cleaned and had visible dirt on them. Second flight was perfect.

My second flight ended up being through United and it was fine. Again, just frustrating that it was so late.

Book cheap flights from Seattle to Toronto

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to Toronto found on KAYAK in the last 72 hours.
10/7Mon
1 stop
31h 44mSEA-YYZ
$79
10/16Wed
1 stop
31h 44mSEA-YYZ
$88
8/24Sat
2 stopsWestJet
11h 00mSEA-YYZ
$158
8/24Sat
1 stopWestJet
8h 51mSEA-YYZ
$162
9/25Wed
nonstopAlaska Airlines
4h 30mSEA-YYZ
$169
9/25Wed
2 stopsUnited Airlines
18h 03mSEA-YYZ
$175
9/25Wed
nonstopAir Canada
4h 33mSEA-YYZ
$176
8/26Mon
1 stopAir Canada
7h 23mSEA-YYZ
$183
8/24Sat
nonstopAlaska Airlines
4h 30mSEA-YYZ
$199
11/20Wed
2 stopsUnited Airlines
22h 30mSEA-YYZ
$263

Search by stops

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Last minute flights from Seattle to Toronto

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Seattle to Toronto that are departing in the next 10 days.
6/4Tue
multi-stop
30h 02mSEA-YYZ
7/10Wed
multi-stop
15h 35mYYZ-SEA
$358
6/4Tue
multi-stop
30h 02mSEA-YYZ
7/10Wed
multi-stop
9h 26mYYZ-SEA
$372
6/4Tue
multi-stopWestJet
8h 15mSEA-YYZ
7/24Wed
multi-stopWestJet
8h 52mYYZ-SEA
$457
6/4Tue
multi-stopWestJet
8h 15mSEA-YYZ
7/24Wed
multi-stopWestJet
11h 22mYYZ-SEA
$476
6/3Mon
multi-stopDelta
7h 59mSEA-YYZ
7/10Wed
multi-stopDelta
9h 09mYYZ-SEA
$507
6/4Tue
multi-stopDelta
7h 59mSEA-YYZ
6/10Mon
multi-stopDelta
8h 29mYYZ-SEA
$515
6/4Tue
nonstopAir Canada
4h 38mSEA-YYZ
7/10Wed
nonstopAir Canada
5h 26mYYZ-SEA
$572
6/4Tue
multi-stopAir Canada
10h 54mSEA-YTZ
7/10Wed
multi-stopAir Canada
14h 05mYTZ-SEA
$822
5/31Fri
nonstopUnited Airlines
4h 38mSEA-YYZ
6/4Tue
multi-stopUnited Airlines
11h 52mYYZ-SEA
$1,052
5/31Fri
multi-stopUnited Airlines
17h 36mSEA-YYZ
6/2Sun
nonstopUnited Airlines
5h 18mYYZ-SEA
$1,094

Search by stops

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Seattle - Toronto Flights

Departure:

Seattle (SEA)United States

Return flight deals:

Toronto - Seattle

Cabin classes:

$1,469
$1,522
$197