SEA - YKF

C$ 500 Find Cheap Flights from Seattle to Toronto Region of Waterloo Intl – Compare and Save

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Everything you should know

Cheapest round-trip
C$ 1,024
Typical prices: C$ 587-C$ 827
Multiple Airlines
Thu 22/11Wed 28/11
SEA - YKF • 1 stop
Cheapest one-way flights
C$ 500
Typical prices: C$ 378-C$ 470
Multiple Airlines
Wed 3/1
SEA - YKF • 1 stop
Top layover airports
Toronto Pearson Intl (YYZ)
Cheapest • Avg C$ 545 (round-trip)
Calgary (YYC)
Shortest trip • 13h 15m (one-way)
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We hope you enjoy your trip to Toronto Region of Waterloo Intl Airport!
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Booking Insights
Flight Deals

Cheap Flights from Seattle to Region of Waterloo Intl (SEA-YKF)

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

Recent round-trip flight deals from Seattle to Region of Waterloo Intl

Sun, 22 Nov - Sat, 28 Nov
Multiple Airlines Logo
5:48 p.m. - 3:45 p.m.SEA  Seattle/Tacoma Intl-YKF Toronto Region of Waterloo Intl
18h 57m1 stop Calgary
Multiple Airlines Logo
7:00 p.m. - 8:57 a.m.YKF  Toronto Region of Waterloo Intl-SEA Seattle/Tacoma Intl
16h 57m1 stop Calgary
C$ 1,024Multiple Airlines
23 hours ago
Sun, 22 Nov - Sat, 28 Nov
Multiple Airlines Logo
5:48 p.m. - 3:45 p.m.SEA  Seattle/Tacoma Intl-YKF Toronto Region of Waterloo Intl
18h 57m1 stop Calgary
Multiple Airlines Logo
7:00 p.m. - 2:42 p.m.YKF  Toronto Region of Waterloo Intl-SEA Seattle/Tacoma Intl
22h 42m2 stops Calgary Vancouver Intl
C$ 1,026Multiple Airlines
23 hours ago
Fri, 4 Dec - Fri, 11 Dec
Multiple Airlines Logo
2:30 p.m. - 6:15 p.m.SEA  Seattle/Tacoma Intl-YKF Toronto Region of Waterloo Intl
24h 45m3 stops Calgary Edmonton Halifax Intl
Multiple Airlines Logo
4:30 p.m. - 1:40 p.m.YKF  Toronto Region of Waterloo Intl-SEA Seattle/Tacoma Intl
24h 10m2 stops Halifax Intl Calgary
C$ 1,410Multiple Airlines
3+ days ago
Fri, 4 Dec - Fri, 11 Dec
Multiple Airlines Logo
2:30 p.m. - 6:15 p.m.SEA  Seattle/Tacoma Intl-YKF Toronto Region of Waterloo Intl
24h 45m2 stops Calgary Halifax Intl
Multiple Airlines Logo
4:30 p.m. - 1:40 p.m.YKF  Toronto Region of Waterloo Intl-SEA Seattle/Tacoma Intl
24h 10m2 stops Halifax Intl Calgary
C$ 1,472Multiple Airlines
3+ days ago
Fri, 4 Dec - Fri, 11 Dec
Multiple Airlines Logo
2:30 p.m. - 6:15 p.m.SEA  Seattle/Tacoma Intl-YKF Toronto Region of Waterloo Intl
24h 45m3 stops Calgary Edmonton Halifax Intl
Multiple Airlines Logo
4:30 p.m. - 5:01 p.m.YKF  Toronto Region of Waterloo Intl-SEA Seattle/Tacoma Intl
27h 31m3 stops Halifax Intl Calgary Vancouver Intl
C$ 1,671Multiple Airlines
3+ days ago
Sun, 22 Nov - Sat, 28 Nov
Multiple Airlines Logo
1:52 p.m. - 3:45 p.m.SEA  Seattle/Tacoma Intl-YKF Toronto Region of Waterloo Intl
22h 53m3 stops Los Angeles Edmonton Calgary
Multiple Airlines Logo
7:00 p.m. - 8:45 a.m.YKF  Toronto Region of Waterloo Intl-SEA Seattle/Tacoma Intl
16h 45m2 stops Calgary Vancouver Intl
C$ 1,764Multiple Airlines
23 hours ago
Sun, 22 Nov - Sat, 28 Nov
Multiple Airlines Logo
1:52 p.m. - 3:45 p.m.SEA  Seattle/Tacoma Intl-YKF Toronto Region of Waterloo Intl
22h 53m3 stops Los Angeles Edmonton Calgary
Multiple Airlines Logo
7:00 p.m. - 9:03 a.m.YKF  Toronto Region of Waterloo Intl-SEA Seattle/Tacoma Intl
41h 03m3 stops Calgary Las Vegas Harry Reid Intl Ontario
C$ 1,784Multiple Airlines
23 hours ago
Booking Insights

Price, demand, and travel trends for Seattle to Toronto Region of Waterloo Intl Airport flights

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

What’s the most popular layover airport when flying from Seattle to Toronto Region of Waterloo Intl Airport?

Calgary (YYC) is the most popular layover for the Seattle to Toronto Region of Waterloo Intl Airport route. 75% of KAYAK users who booked 1-stop round-trips over the past 3 months connected via YYC.

What is the cheapest layover airport when flying from Seattle to Toronto Region of Waterloo Intl Airport?

Flights via Toronto Pearson Intl (YYZ) offer the most affordable fares, with an average round-trip price of C$ 545. Based on KAYAK data over the past 3 months.

When flying from Seattle to Toronto Region of Waterloo Intl Airport, which airport offers the shortest layover?

Toronto Pearson Intl (YYZ) had the shortest average connection time for Seattle to Toronto Region of Waterloo Intl Airport layovers at 6h 20m over the past three months.

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Key details for Seattle to Toronto Region of Waterloo Intl Airport flights

Cheapest flight

C$ 500
One-way flight from Seattle to Toronto Region of Waterloo Intl Airport

When to book flights from Seattle to Region of Waterloo Intl

Are your dates flexible? Find out the best times to travel from Seattle to Region of Waterloo Intl 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 Region of Waterloo Intl Airport flight questions, answered

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

  • How long does a flight from Seattle to Toronto Region of Waterloo Intl Airport take?

    There are currently no direct flights available from Seattle to Toronto Region of Waterloo Intl Airport. Flights with 1 layover take between 9h 18m and 13h 15m in total, depending on the connection.

  • Do I need a passport to fly from Seattle to Toronto Region of Waterloo Intl Airport?

    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.

  • Have flight prices from Seattle to Toronto Region of Waterloo Intl Airport changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route varied from about C$ 1,024 to C$ 1,784. That means the highest observed fare was about 74% higher than the lowest one.

  • How are flight prices from Seattle to Toronto Region of Waterloo Intl Airport looking right now?

    One-way fares from Seattle to Toronto Region of Waterloo Intl Airport are currently higher than usual. Average one-way flight prices are about C$ 739, which is 57% above the typical average for this route.

  • Which airports can I use when flying from Seattle to Toronto Region of Waterloo Intl Airport?

    Flights from Seattle to Toronto Region of Waterloo Intl Airport usually depart from Seattle/Tacoma Intl (SEA) and arrive at Toronto Region of Waterloo Intl (YKF).

  • Which airports do connecting flights from Seattle to Toronto Region of Waterloo Intl Airport pass through?

    Connecting flights from Seattle to Toronto Region of Waterloo Intl Airport most commonly pass through:

    • Calgary (YYC) – 75% of one-stop connections
    • Toronto Pearson Intl (YYZ) – 25% of one-stop connections

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

    Yes. Flexible dates can save you up to 70% on flights from Seattle to Toronto Region of Waterloo Intl Airport. Friday is the cheapest departure day at C$ 374 round-trip on average, while Monday is the most expensive at C$ 1,237, a difference of C$ 863.

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

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

    Flying via Toronto Pearson Intl (YYZ) gives the shortest average 1-stop total travel time at 9h 18m, compared with 13h 15m via Calgary (YYC).

  • What is the time difference between Seattle and Toronto Region of Waterloo Intl Airport?

    Toronto Region of Waterloo Intl Airport 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 Region of Waterloo Intl Airport?

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

Your guide to booking Seattle to Toronto Region of Waterloo Intl Airport 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 Friday departure and avoid flying on Monday. On this route, Friday flights average C$ 374, about C$ 863 less than Monday fares (70% savings) based on the last 12 months.

More options for your flight from Seattle to Region of Waterloo Intl

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