YYZ - SEA

C$ 319 Find Cheap Flights from Toronto Pearson Airport to Seattle – Compare and Save

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Everything you should know

Cheapest round-trip
C$ 448
Typical prices: C$ 413-C$ 772
WestJet
Mon 22/1Wed 31/1
YYZ - SEA • 1 stop
Cheapest direct flights
C$ 664
Typical prices: C$ 411-C$ 821
Alaska Airlines
Sat 8/12Sat 15/12
YYZ - SEA • Direct
Direct flights
You can fly direct with Alaska Airlines and Air Canada. Average duration is 5h 36m
Direct flights
+1
Direct flights
+1
Avoid delays
Most punctual • 84% on-time
Best time • Fewest delays
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 11 weeks in advance save around 52% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 40% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg C$ 508 (round-trip)
Shortest trip • 8h 01m (one-way)
Insights
Insights
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We hope you enjoy your trip to Seattle!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Pearson Intl to Seattle (YYZ-SEA)

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

Recent round-trip flight deals from Pearson Intl to Seattle

Fri, 22 Jan - Sun, 31 Jan
WestJet Logo
6:10 a.m. - 1:40 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
WestJet Logo
2:30 p.m. - 5:45 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
12h 15m2 stops Calgary Edmonton
C$ 448WestJet
3+ days ago
Tue, 29 Dec - Thu, 7 Jan
WestJet Logo
7:00 a.m. - 1:40 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
9h 40m2 stops Edmonton Calgary
WestJet Logo
2:30 p.m. - 5:45 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
12h 15m2 stops Calgary Edmonton
C$ 454WestJet
3+ days ago
Tue, 17 Nov - Thu, 26 Nov
Multiple Airlines Logo
6:10 a.m. - 1:40 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
10h 30m1 stop Calgary
Multiple Airlines Logo
9:53 p.m. - 6:51 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
29h 58m1 stop Las Vegas Harry Reid Intl
C$ 541Multiple Airlines
2 days ago
Sun, 22 Nov - Thu, 26 Nov
Multiple Airlines Logo
7:30 a.m. - 1:40 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
9h 10m1 stop Calgary
Multiple Airlines Logo
9:53 p.m. - 6:51 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
29h 58m1 stop Las Vegas Harry Reid Intl
C$ 541Multiple Airlines
2 days ago
Wed, 2 Dec - Wed, 9 Dec
Delta Logo
5:15 p.m. - 11:53 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
9h 38m1 stop Minneapolis St Paul
Delta Logo
1:36 p.m. - 11:07 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
6h 31m1 stop Detroit Metropolitan Wayne County
C$ 566Delta
1 day ago
Mon, 7 Dec - Wed, 9 Dec
Delta Logo
5:25 p.m. - 11:55 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
9h 30m1 stop Atlanta Hartsfield-Jackson
Delta Logo
11:15 p.m. - 8:55 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
6h 40m1 stop Detroit Metropolitan Wayne County
C$ 576Delta
14 hours ago
Wed, 25 Nov - Sun, 29 Nov
Air Canada Logo
8:45 a.m. - 2:37 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
8h 52m1 stop Vancouver Intl
Air Canada Logo
7:05 p.m. - 6:52 a.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
8h 47m1 stop Vancouver Intl
C$ 627Air Canada
2 days ago
Mon, 16 Nov - Mon, 16 Nov
Alaska Airlines Logo
5:15 p.m. - 7:45 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
5h 30mdirect
Alaska Airlines Logo
9:59 p.m. - 5:41 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
16h 42m2 stops Portland Chicago O'Hare Intl
C$ 639Alaska Airlines
2 days ago
Sat, 14 Nov - Sun, 15 Nov
Alaska Airlines Logo
11:36 a.m. - 6:00 a.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
21h 24m2 stops Chicago O'Hare Intl Portland
Alaska Airlines Logo
8:19 a.m. - 4:05 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
4h 46mdirect
C$ 639Alaska Airlines
2 days ago
Wed, 11 Nov - Mon, 16 Nov
Air Canada Logo
6:25 p.m. - 8:59 p.m.YYZ  Toronto Pearson Intl-SEA Seattle/Tacoma Intl
5h 34mdirect
Air Canada Logo
7:45 a.m. - 3:25 p.m.SEA  Seattle/Tacoma Intl-YYZ Toronto Pearson Intl
4h 40mdirect
C$ 796Air Canada
15 hours ago
Booking Insights

Price, demand, and travel trends for Toronto Pearson Intl Airport to Seattle 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 Toronto Pearson Intl Airport to Seattle?

Round-trip flights from Toronto Pearson Intl Airport to Seattle typically range from C$ 413 to C$ 772. The lowest price found in the past 5 days was C$ 448, on WestJet.

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

Based on deals KAYAK users found in the last 12 months, Tuesday is the cheapest day of the week to fly from Toronto Pearson Intl Airport to Seattle. It's 13% cheaper than the average day, while Sunday is the most expensive, with prices 11% higher.

What is the cheapest month to fly from Toronto Pearson Intl Airport to Seattle?

•February is the cheapest month to fly from Toronto Pearson Intl Airport to Seattle at C$ 345 round-trip.
•December (C$ 672) and July (C$ 669) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 95% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Toronto Pearson Intl Airport to Seattle the cheapest?

Flights from Toronto Pearson Intl Airport to Seattle are cheapest 11 weeks before departure. Booking in this window typically costs about 52% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from Pearson Intl to Seattle

 
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.

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.

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.

Key details for Toronto Pearson Intl Airport to Seattle flights

Low season

December

Cheapest flight

C$ 319
Beat the crowds with an average 28% drop in traveller numbers.
The most popular month to fly with an average 51% increase in traveller numbers.
One-way flight from Toronto Pearson Intl 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

Your Toronto Pearson Intl Airport to Seattle 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 Toronto Pearson Intl Airport to Seattle?

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

    • Earliest: departs at 4:55 pm and lands at 10:31 pm
    • Latest: departs at 7:20 pm and lands at 12:56 am.

    The flight takes about 5h 36m.

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

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

    • Economy Class
    • Business Class
    • First Class

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

    A direct flight from Toronto Pearson Intl Airport to Seattle takes 5h 36m, covering 5,319 km.

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

    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 Toronto Pearson Intl Airport to Seattle flight?

    Round-trip flights from Toronto Pearson Intl Airport to Seattle range from C$ 413 to C$ 772, with an average of C$ 572 over the past 12 months. Anything below C$ 413 counts as a good deal.

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

    Last-minute fares on this route (booked within two weeks of departure) run 56% above the C$ 572 route average. Book 11 weeks before departure for the lowest fares.

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

    On this route, layover flights are cheaper than direct options on average. Layover fares average C$ 508 round-trip via Charlotte Douglas (CLT), compared to C$ 597 for direct.

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

    There is no standard. Checked bag policies vary by airline on this route. Most carriers charge C$ 34–C$ 140 for the first checked bag in economy. Premium fares and elite status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from Toronto Pearson Intl Airport to Seattle?

    The Boeing 737 MAX 9 family is used most often on this route, operated mainly by Alaska Airlines and Air Tahiti Nui. Other aircraft seen on the route include Airbus A220-300 variants.

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

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

  • Have flight prices from Toronto Pearson Intl Airport to Seattle 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$ 448 to C$ 1,998. That means the highest observed fare was about 4x higher than the lowest one.

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

    Two airlines offer in-flight Wi-Fi on Toronto Pearson Intl Airport to Seattle 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 Toronto Pearson Intl Airport to Seattle looking right now?

    One-way fares from Toronto Pearson Intl Airport to Seattle are currently lower than usual. Average one-way flight prices are about C$ 355, which is 5% below the typical average for this route.

  • What car rental options are available at Seattle/Tacoma Intl Airport (SEA)?

    Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around C$ 5 for economy cars. Top options include:

    • Fox
    • Europcar
    • Thrifty
    • Budget
    • Hertz

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

    Flights from Toronto Pearson Intl Airport to Seattle usually depart from Toronto Pearson Intl (YYZ) and arrive at Seattle/Tacoma Intl (SEA).

  • What time of day has the fewest delays on flights from Toronto Pearson Intl Airport to Seattle?

    Afternoon flights have the fewest delays on this route, while evening departures tend to have the most.

  • At what point is a flight considered delayed on the route from Toronto Pearson Intl Airport to Seattle?

    A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Toronto Pearson Intl Airport to Seattle route, 30% of flights were delayed in the past three months, with delays averaging 2h 35m.

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

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

    • Calgary (YYC) – 74% of one-stop connections
    • Vancouver Intl (YVR) – 14% of one-stop connections
    • Chicago O'Hare Intl (ORD) – 6% of one-stop connections
    • Detroit Metropolitan Wayne County (DTW) – 2% of one-stop connections

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

    Yes. Flexible dates can save you up to 22% on flights from Toronto Pearson Intl Airport to Seattle. Tuesday is the cheapest departure day at C$ 501 round-trip on average, while Sunday is the most expensive at C$ 640, a difference of C$ 139.

    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 Toronto Pearson Intl Airport to Seattle?

    2 airlines operate flights between Toronto Pearson Intl Airport and Seattle. 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 Toronto Pearson Intl Airport to Seattle?

    Flying via Salt Lake City (SLC) gives the shortest average 1-stop total travel time at 8h 01m, compared with 8h 03m via Vancouver Intl (YVR) and 8h 04m via Chicago O'Hare Intl (ORD).

  • What is the time difference between Toronto Pearson Intl Airport and Seattle?

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

  • Which popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Lumen Field, T-Mobile Park, and Seattle Waterfront. These are among the most viewed places in Seattle on KAYAK.

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

    Among airlines operating Toronto Pearson Intl Airport to Seattle flights:

    • Alaska Airlines: offers extra legroom; offers free seat selection
    • Air Canada: offers extra legroom; offers free seat selection
    • United 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 Toronto Pearson Intl Airport to Seattle 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
    • Jazz: a carry-on bag and a checked bag in Economy 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 Toronto Pearson Intl Airport to Seattle 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 Tuesday departure and avoid flying on Sunday. On this route, Tuesday flights average C$ 501, about C$ 139 less than Sunday fares (22% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 11 weeks before you fly. On this route, that window historically saves about 52% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Toronto Pearson Intl Airport to Seattle trip for February. Fares historically average C$ 345 round-trip in that month – typically C$ 328 less than the most expensive month, which is December (based on the last 12 months).
  • For the best chance of arriving on time, fly with Alaska Airlines. Over the past three months, 84% of Alaska Airlines flights from Toronto Pearson Intl Airport to Seattle arrived on time, slightly above the route average of 70%. When flights on this route arrive late, they're delayed by an average of 2h 35m, so choosing an airline with strong on-time performance can make a difference if you're on a tight schedule.
  • If you have the time, taking a 1-stop flight through Charlotte Douglas Airport (CLT) can be cheaper than flying direct. The cheapest layover option averages C$ 508 round-trip on this route – about C$ 89 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.

    • Coast Gateway Hotel
    • Seattle Airport Marriott
    • Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport

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,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

Direct returns

Seattle/Tacoma Intl to Toronto Pearson Intl

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

More options for your flight from Pearson Intl to Seattle

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