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SEA - YTO

Find cheap flights from Seattle to Toronto from C$ 123

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 18/6. 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
Fri 7/6
Fri 14/6

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, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Toronto, as well as popular online travel agencies
In the last 7 days, travellers have searched 43,707,506 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
9:35 a.m. - 6:35 a.m.SEA-YYZ
18h 00m1 stop
8:20 p.m. - 8:32 a.m.YYZ-SEA
15h 12m1 stop
C$ 319
Find Deal
Tue, 4 Jun - Tue, 11 Jun
9:28 a.m. - 6:35 a.m.SEA-YYZ
18h 07m1 stop
8:20 p.m. - 8:32 a.m.YYZ-SEA
15h 12m1 stop
C$ 356
Find Deal
Thu, 6 Jun - Thu, 13 Jun
1:50 p.m. - 12:52 a.m.SEA-YKF
8h 02m1 stop
6:15 a.m. - 12:56 p.m.YKF-SEA
9h 41m1 stop
C$ 479WestJet
Find Deal
Fri, 2 Aug - Wed, 14 Aug
1:50 p.m. - 12:52 a.m.SEA-YKF
8h 02m1 stop
6:15 a.m. - 12:56 p.m.YKF-SEA
9h 41m1 stop
C$ 481WestJet
Find Deal
Fri, 2 Aug - Wed, 7 Aug
7:00 a.m. - 2:30 p.m.SEA-YYZ
4h 30mdirect
3:40 p.m. - 6:02 p.m.YYZ-SEA
5h 22mdirect
C$ 540Alaska Airlines
Find Deal
Sun, 25 Aug - Sat, 31 Aug
11:10 p.m. - 6:50 a.m.SEA-YYZ
4h 40mdirect
3:00 p.m. - 9:25 p.m.YYZ-SEA
9h 25m1 stop
C$ 545Air Canada
Find Deal
Sat, 3 Aug - Sat, 17 Aug
7:40 a.m. - 7:49 p.m.SEA-YTZ
9h 09m1 stop
3:20 p.m. - 9:16 p.m.YTZ-SEA
8h 56m1 stop
C$ 546Air Canada
Find Deal
Sat, 25 May - Sat, 1 Jun
11:10 p.m. - 6:50 a.m.SEA-YYZ
4h 40mdirect
6:15 a.m. - 11:44 a.m.YYZ-SEA
8h 29m1 stop
C$ 560United Airlines
Find Deal
Sat, 24 Aug - Sun, 8 Sep
12:25 a.m. - 11:52 a.m.SEA-YYZ
8h 27m1 stop
7:43 p.m. - 12:59 a.m.YYZ-SEA
8h 16m1 stop
C$ 564United Airlines
Find Deal
Thu, 30 May - Mon, 10 Jun
7:00 a.m. - 2:30 p.m.SEA-YYZ
4h 30mdirect
3:40 p.m. - 6:00 p.m.YYZ-SEA
5h 20mdirect
C$ 644Alaska Airlines
Find Deal
Sun, 11 Aug - Thu, 15 Aug

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 C$ 291 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 C$ 215.

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.
If your flying dates are flexible, you should consider flying to Toronto on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Saturday is the most expensive day to fly from Seattle to Toronto. For your return ticket, we recommend flying on a Tuesday and avoiding Sundays for the best 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 January, where tickets cost C$ 712 on average. On the other hand, the most expensive months are July and December, where the average cost of tickets is C$ 879 and C$ 868 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 C$ 211. KAYAK users also found Seattle to Toronto round-trip flights on WestJet from C$ 479 and on Alaska Airlines from C$ 540.

Which airlines fly direct 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 direct from Seattle to Toronto. They are Air Canada and Alaska Airlines. The cheapest airline for this route is Alaska Airlines, with the best deal found costing C$ 341. 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 38m. The most common departure time is 6:00 a.m. 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?

Direct flights from Seattle generally make it to Toronto in 4h 30m. The flying distance between the two cities is 5,349 km.

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

C$ 123
Best time to beat the crowds but there is an average 2% 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 C$ 90 for a one-way ticket and C$ 233 for a round-trip.

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

    Seattle is served by only 1 airport and there are 2 airports in Toronto. You will leave Seattle from Seattle/Tacoma Intl and you will be arriving in Toronto at one of these airports: Toronto Kitchener-Waterloo 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, WestJet Encore, Delta, ITA Airways, and Air France.

  • 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 direct flights from Seattle to Toronto on a daily basis.

  • Which is the best airline for flights from Seattle to Toronto, WestJet or Air Canada?

    The two airlines most popular with KAYAK users for flights from Seattle to Toronto are WestJet and Air Canada. With an average price for the route of C$ 764 and an overall rating of 7.5, WestJet is the most popular choice. Air Canada is also a great choice for the route, with an average price of C$ 776 and an overall rating of 7.0.

  • 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 C$ 317 or less one-way and C$ 322 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, +1 more

Air Canada, Alaska Airlines, +2 more

Sunday

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

Air Canada, Alaska Airlines, +3 more

See more nonstop 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 nonstop flights
See more nonstop flights

Top airlines flying 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.
7.5
WestJetOverall score based on 2948 reviews
6.5Entertainment
6.5Food
8.2Crew
7.7Boarding
7.3Comfort
Airline reviews

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

8.0 ExcellentMark, Apr. 2024BNA - YYZ
Read more about WestJet reviews

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

Our plane entertainment system was out… That made for a very long flight. In my opinion, WestJet should consider a credit or a partial refund for that.

I liked when we actually were allowed to get on the airplane back to Edmonton… What could’ve been better well, not having our flight be delayed five hours could’ve been better… And then canceling our flight from Edmonton to Toronto, and then rescheduling us to fly from Honolulu to Edmonton -Edmonton to Vancouver, and then Vancouver to Toronto with a 12 hour layover in Edmonton pretty much was hell… Total travel time to get home 38 hours that’s really what could’ve been better. The two gate attendants for WestJet in Honolulu told us to come back to the gate to try to make other arrangements because they had to board the Calgary flight 1st and they didn’t have time to talk to me but by the time I came back when they told us to they said you should’ve come earlier to make these arrangements everyone else already changed their flights… We found out later that 30 people did not get on the 2:30 AM Edmonton flight. They ended up getting on the midnight flight to Calgary and making other arrangements to Toronto and so forth which we could’ve taken advantage of that if they had allowed us to when I initially had went up and approached the two gate attendance one of their names was Denise. One of the kindest WestJet employee was the one who received us in Edmonton, who felt so bad about the entire situation she got us for more meal vouchers and flew us first class from Vancouver to Toronto. In Honolulu they had given us two vouchers to use for dinner and they weren’t valid outside of Canada so we had purchased a meal and they were completely useless… But nowhere did it say that they could only be used in Canada So when we received more food vouchers in Edmonton, all of them did end up working in Canada, but it was just so convoluted. Overall, we have traveled to other countries even going as far as Africa… and that experience was far easier than flying to Hawaii from Canada I cannot believe any of this happened and how inconvenient it was We arrived, exhausted after 38 hours of travel, and could not even go to work on Monday. I look forward to hearing from KAYAK or from WestJet for some sort of compensation over the situation.

First time flying Air Canada and the trip was very pleasant! They did a great job getting us out of Toronto and into Rome (early!) For an international flight it was very enjoyable.

You do not have a space for flight cancelled. BUT!!! Air Canada handled it great. Was booked on another airline for the next day. The original flight was booked solid. But he precheck by the maintenance found a mechanical problem and the plane was not safe to fly. It was an inconvenience to have to wait until next day but I would rather arrive safely.

Very good other than we have to wait for one crew and we’re delayed and the pilot and his co- pilot has to make a difference to be right on time arrival. Disappointed about no food service also.

I had written all my complaints on my trip from Grand Junction to Denver so I will repeat it here! I was absolutely appalled that I had to pay for a regular seat that I choose 24 hrs before boarding! Also I checked my large bag which I had to pay for as well, and by the time I boarded all the room in the bins were gone so also had to check that one. I noticed people pulling out oversized suitcases, bigger than the measurements stated for carry on, and also large pack packs stuffed full! So these people were taking up 2 or 3 spaces that the rest of us should have been able to use but couldn’t! NoTV on the flight! Thankfully I had downloaded the United Airlines app and was able to watch movies on my phone. Don’t remember the last time I flew in a plane with no movie screens!

The crew was friendly, the seats are too small. Air travel is barely tolerable anymore.

Food was icecold or frozen including breakfast. Hopeless service. Rude crew.

The flight was very uncomfortable and there was no snacks served for the 13 hours international flight. In addition, the flight was delayed 3 hours

Due to a strike taking place with the airline, it negatively impacted my flight in multiple ways. My flight was delayed over 2 hours and the food served was mediocre at best.

Cabin crew were great. Seats are criminal for tall people

My flight was great! Gate attendants and crew were great… pleasant and in good spirits. Flight delayed several hours and we were well informed of the status while on plane. Thank you!

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.
18/6Tue
1 stop
17h 46mSEA-YYZ
C$ 123
18/6Tue
1 stop
17h 46mSEA-YYZ
C$ 147
4/7Thu
2 stopsWestJet
12h 55mSEA-YYZ
C$ 211
19/6Wed
2 stopsWestJet
11h 00mSEA-YYZ
C$ 220
28/5Tue
directAlaska Airlines
4h 40mSEA-YYZ
C$ 237
29/7Mon
1 stopAir Canada
8h 16mSEA-YYZ
C$ 244
31/5Fri
1 stopUnited Airlines
6h 59mSEA-YYZ
C$ 245
25/5Sat
2 stopsUnited Airlines
11h 33mSEA-YYZ
C$ 256
16/5Thu
1 stopAir Canada
8h 15mSEA-YYZ
C$ 275
31/5Fri
directAlaska Airlines
4h 40mSEA-YYZ
C$ 341

Search by stops

Search by airline

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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.
12/5Sun
directAir Canada
4h 38mSEA-YYZ
17/5Fri
multi-stopAir Canada
7h 22mYYZ-SEA
C$ 611
9/5Thu
multi-stopAir Canada
9h 05mSEA-YYZ
13/5Mon
multi-stopAir Canada
8h 57mYYZ-SEA
C$ 618
11/5Sat
multi-stopAmerican Airlines
8h 27mSEA-YYZ
17/5Fri
multi-stopAmerican Airlines
17h 20mYYZ-SEA
C$ 637
11/5Sat
multi-stopAmerican Airlines
10h 14mSEA-YYZ
17/5Fri
multi-stopAmerican Airlines
17h 20mYYZ-SEA
C$ 650
10/5Fri
multi-stop
19h 50mSEA-YYZ
12/5Sun
multi-stop
15h 25mYYZ-SEA
C$ 697
9/5Thu
multi-stopAir Canada
9h 05mSEA-YYZ
13/5Mon
directAir Canada
5h 18mYYZ-SEA
C$ 790
9/5Thu
multi-stopDelta
8h 14mSEA-YYZ
11/5Sat
multi-stopDelta
10h 49mYYZ-SEA
C$ 897
9/5Thu
multi-stop
12h 55mSEA-YYZ
11/5Sat
multi-stop
17h 41mYYZ-SEA
C$ 911
10/5Fri
multi-stopWestJet
19h 50mSEA-YYZ
13/5Mon
multi-stopWestJet
8h 01mYYZ-SEA
C$ 933
10/5Fri
multi-stopWestJet
19h 50mSEA-YYZ
12/5Sun
multi-stopWestJet
31h 56mYYZ-SEA
C$ 949

Search by stops

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Seattle - Toronto Flights

Departure:

Seattle (undefined)United States

Return flight deals:

Toronto - Seattle

Cabin classes:

C$ 3,198
C$ 215