SEA - YTO

C$ 241 Find Cheap Flights from Seattle to Toronto – Compare and Save

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Everything you should know

Cheapest round-trip
C$ 507
Typical prices: C$ 464-C$ 933
WestJet
Sat 15/12Tue 18/12
SEA - YYZ • 2 stops
Cheapest direct flights
C$ 669
Typical prices: C$ 463-C$ 993
Alaska Airlines
Sat 24/2Wed 28/2
SEA - YYZ • Direct
Direct flights
Every day
You can fly direct with Alaska Airlines and Air Canada. Average duration is 4h 39m
Direct flights
+1
Direct flights
+1
Top routes
SEA - YTZ
Cheapest • 1% average savings
SEA - YYZ
Most popular
Insights
Insights
When to book
14 weeks
in advance
Our data shows that travellers who book at least 14 weeks in advance save around 59% compared to booking last minute.
Insights
Insights
When to travel
January
Cheapest • 47% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Calgary (YYC)
Cheapest • Avg C$ 538 (round-trip)
Denver Intl (DEN)
Shortest trip • 7h 42m (one-way)
Insights
Insights
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We hope you enjoy your trip to Toronto!
Flight Deals
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Expert advice
Flight Deals

Cheap Flights from Seattle to Toronto (SEA-YTO)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Toronto

Tue, 15 Dec - Fri, 18 Dec
WestJet Logo
2:30 p.m. - 5:45 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
12h 15m2 stops Calgary Edmonton
WestJet Logo
6:10 a.m. - 1:40 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
C$ 507WestJet
3+ days ago
Mon, 16 Nov - Thu, 7 Jan
WestJet Logo
2:30 p.m. - 5:45 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
12h 15m2 stops Calgary Edmonton
WestJet Logo
6:10 a.m. - 1:40 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
C$ 508WestJet
3+ days ago
Thu, 24 Dec - Tue, 5 Jan
WestJet Logo
2:30 p.m. - 5:45 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
12h 15m2 stops Calgary Edmonton
WestJet Logo
7:30 a.m. - 1:40 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
9h 10m1 stop Calgary
C$ 513WestJet
3+ days ago
Thu, 14 Jan - Mon, 18 Jan
Multiple Airlines Logo
6:33 p.m. - 6:50 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
9h 17m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
7:30 a.m. - 1:40 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
9h 10m1 stop Calgary
C$ 528Multiple Airlines
3+ days ago
Sat, 5 Dec - Sun, 13 Dec
Multiple Airlines Logo
8:46 a.m. - 9:42 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
9h 56m1 stop San Francisco
Multiple Airlines Logo
7:30 a.m. - 1:40 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
9h 10m1 stop Calgary
C$ 545Multiple Airlines
2 days ago
Sun, 6 Dec - Thu, 28 Jan
Multiple Airlines Logo
9:09 p.m. - 6:52 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
30h 43m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
7:30 a.m. - 1:40 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
9h 10m1 stop Calgary
C$ 556Multiple Airlines
1 day ago
Wed, 24 Feb - Sun, 28 Feb
Alaska Airlines Logo
8:21 a.m. - 4:05 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
4h 44mdirect
Alaska Airlines Logo
5:15 p.m. - 7:43 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
5h 28mdirect
C$ 669Alaska Airlines
2 days ago
Sat, 28 Nov - Sat, 5 Dec
Alaska Airlines Logo
8:31 a.m. - 4:05 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
4h 34mdirect
Alaska Airlines Logo
5:15 p.m. - 7:56 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
5h 41mdirect
C$ 675Alaska Airlines
1 day ago
Tue, 10 Nov - Thu, 19 Nov
Air Canada Logo
10:10 a.m. - 9:09 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
7h 59m1 stop Vancouver Intl
Air Canada Logo
8:05 a.m. - 2:37 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
9h 32m1 stop Vancouver Intl
C$ 688Air Canada
3+ days ago
Mon, 9 Nov - Thu, 12 Nov
Air Canada Logo
3:15 p.m. - 1:24 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
7h 09m1 stop Vancouver Intl
Air Canada Logo
8:45 a.m. - 2:37 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
8h 52m1 stop Vancouver Intl
C$ 700Air Canada
3+ days ago
Booking Insights

Price, demand, and travel trends for Seattle to Toronto flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

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

Round-trip flights from Seattle to Toronto typically range from C$ 464 to C$ 933. The lowest price found in the past 5 days was C$ 507, on WestJet.

What is the cheapest Seattle to Toronto flight route?

There's little price difference between Seattle to Toronto routes. They average around C$ 691 round-trip, based on KAYAK data over the past 12 months.

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

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from Seattle to Toronto. It's 17% cheaper than the average day, while Sunday is the most expensive, with prices 28% higher.

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

•January is the cheapest month to fly from Seattle to Toronto at C$ 370 round-trip.
•December (C$ 852) and September (C$ 822) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 130% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Seattle to Toronto the cheapest?

Flights from Seattle to Toronto are cheapest 14 weeks before departure. Booking in this window typically costs about 59% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Expert advice

Expert advice for your flight from Seattle to Toronto

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines and SEA

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Mark Stachiew

Mark Stachiew

Expert on YYZ

Mark Stachiew has been exploring the world and writing about it for more than 30 years. His travel stories have appeared in numerous newspapers, magazines and online publications in Canada, the United States and beyond.

Read more

Key details for Seattle to Toronto flights

Low season

February

Cheapest flight

C$ 241
Beat the crowds with an average 45% drop in traveller numbers.
The most popular month to fly with an average 43% increase in traveller numbers.
One-way flight from Seattle to Toronto Pearson Intl 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

Your Seattle to Toronto flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • What are the earliest and latest flights from Seattle to Toronto?

    These are the earliest and latest flight times available from Seattle to Toronto:

    • Earliest: departs at 7:45 am and lands at 12:24 pm
    • Latest: departs at 8:33 am and lands at 1:12 pm.

    The flight takes about 4h 39m.

  • Which cabin classes can I book on flights from Seattle to Toronto?

    Three cabin classes are available on flights from Seattle to Toronto:

    • Economy Class
    • Business Class
    • First Class

  • How long does a flight from Seattle to Toronto take?

    A direct flight from Seattle to Toronto takes 4h 39m, covering 5,349 km.

  • Do I need a passport to fly from Seattle to Toronto?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Seattle to Toronto flight?

    Round-trip flights from Seattle to Toronto range from C$ 464 to C$ 933, with an average of C$ 700 over the past 12 months. Anything below C$ 464 counts as a good deal.

  • How expensive are last-minute Seattle to Toronto flights?

    Last-minute fares on this route (booked within two weeks of departure) run 66% above the C$ 700 route average. Book 14 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from Seattle to Toronto?

    On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 538 round-trip via Calgary (YYC), compared to C$ 727 for direct.

  • What is the standard checked bag allowance on flights from Seattle to Toronto?

    There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 56–C$ 140 for the first checked bag in economy. Premium fares and elite status bookings typically include a free checked bag.

  • How are flight departures from Seattle to Toronto spread across the day?

    Morning is the busiest departure period on Seattle to Toronto flights, with 100% leaving in that window. Afternoon departures account for 0%, Evening flights for 0%, and Night flights for 0%.

  • Have flight prices from Seattle to Toronto changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about C$ 507 to C$ 2,639. That means the highest observed fare was about 5x higher than the lowest one.

  • Which airlines offer Wi-Fi on Seattle to Toronto flights?

    Two airlines offer in-flight Wi-Fi on Seattle to Toronto flights:

    • Alaska Airlines
    • Air Canada

    Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty program; others are paid add-ons priced by flight length.

  • How are flight prices from Seattle to Toronto looking right now?

    One-way fares from Seattle to Toronto are currently lower than usual. Average one-way flight prices are about C$ 304, which is 15% below the typical average for this route.

  • What car rental options are available in Toronto?

    Since Toronto is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
    Near Toronto Pearson Intl Airport (YYZ) – daily rates from around C$ 8:

    • Ace
    • City Car & Truck Rental
    • Routes Car & Truck Rentals
    • Zoom Rent A Car
    • Hertz

    Near Toronto Island Airport (YTZ) – daily rates from around C$ 18:

    • Hertz
    • Enterprise Rent-A-Car
    • National
    • Advance Car And Truck Rental
    • Budget

  • Which airports can I use when flying from Seattle to Toronto?

    Flights from Seattle to Toronto usually depart from Seattle/Tacoma Intl (SEA) and may arrive at several airports in Toronto area, including Toronto Region of Waterloo Intl (YKF), Toronto Island (YTZ) and Toronto Pearson Intl (YYZ).

  • Which airports do connecting flights from Seattle to Toronto pass through?

    One-stop flights from Seattle to Toronto most commonly connect through:

    • Calgary (YYC) – 75% of one-stop connections
    • Vancouver Intl (YVR) – 11% of one-stop connections
    • Chicago O'Hare Intl (ORD) – 5% of one-stop connections
    • Salt Lake City (SLC) – 2% of one-stop connections

  • Can I save money by using flexible dates for flights from Seattle to Toronto?

    Yes. Flexible dates can save you up to 36% on flights from Seattle to Toronto. Wednesday is the cheapest departure day at C$ 581 round-trip on average, while Sunday is the most expensive at C$ 901, a difference of C$ 319.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • Which airlines fly from Seattle to Toronto?

    2 airlines operate flights between Seattle and Toronto. The airlines offering direct flights on this route include:

    • Alaska Airlines
    • Air Canada

  • How much time can I save by choosing a different layover airport when travelling from Seattle to Toronto?

    Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time at 7h 42m, compared with 7h 48m via Vancouver Intl (YVR) and 7h 48m via Salt Lake City (SLC).

  • What is the time difference between Seattle and Toronto?

    Toronto is 3 hours ahead of Seattle (Eastern Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • Which popular places can I visit in Toronto?

    Some of the most popular sights in Toronto are Rogers Centre, Scotiabank Arena, and Union Station. These are among the most viewed places in Toronto on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Seattle to Toronto flights?

    Among airlines operating Seattle to Toronto flights:

    • Alaska Airlines: offers free seat selection
    • Air Canada: offers free seat selection
    • United Airlines: offers free seat selection
    • Hawaiian Airlines: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Seattle to Toronto flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Alaska Airlines: a carry-on bag and a checked bag in Economy Class
    • Air Canada: a carry-on bag and a checked bag in Economy Class
    • United Airlines: a carry-on bag and a checked bag in Business Class

    Baggage allowance can vary by ticket type, cabin class, route, and airline, so always check the fare details before booking.

Your guide to booking Seattle to Toronto flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Sunday. On this route, Wednesday flights average C$ 581, about C$ 319 less than Sunday fares (35% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 14 weeks before you fly. On this route, that window historically saves about 59% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Seattle to Toronto trip for January. Fares historically average C$ 370 round-trip in that month – typically C$ 482 less than the most expensive month, which is December (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Calgary Airport (YYC) can be cheaper than flying direct. The cheapest layover option averages C$ 538 round-trip on this route – about C$ 189 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, hotels close to the airport you're flying into can be a convenient option.

    Near Toronto Pearson Intl Airport

    • Crowne Plaza Toronto Airport By IHG
    • Sheraton Gateway Hotel in Toronto International Airport
    • Spark by Hilton Toronto Airport

    Near Toronto Island Airport

    • The Omni King Edward Hotel
    • The Westin Harbour Castle, Toronto
    • DoubleTree by Hilton Toronto Downtown

Prefer to fly direct from Seattle to Toronto?

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

Direct departures

Seattle/Tacoma Intl to Toronto

Monday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Tuesday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Friday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Saturday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Sunday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

See more nonstop flights

Direct returns

Toronto to Seattle/Tacoma Intl

Monday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Thursday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Friday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Saturday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

Sunday

Air Canada,Alaska Airlines

Air Canada,Alaska Airlines

See more nonstop flights

More options for your flight from Seattle to Toronto

Complete your trip to Toronto with a hotel stay or car rental

Car rentals in Toronto
Hotels in Toronto
Vacations in Toronto