YKF - SEA

C$ 439 Find Cheap Flights from Toronto Region of Waterloo Intl to Seattle – Compare and Save

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Everything you should know

Cheapest one-way flights
C$ 439
Typical prices: C$ 275-C$ 358
Multiple Airlines
Mon 24/12
YKF - SEA • 1 stop
When to travel
May
Cheapest • 32% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Toronto Pearson Intl (YYZ)
Cheapest • Avg C$ 417 (round-trip)
Calgary (YYC)
Shortest trip • 12h 34m (one-way)
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Cheap Flights from Region of Waterloo Intl to Seattle (YKF-SEA)

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

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

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YKF  Toronto Region of Waterloo Intl-SEA Seattle/Tacoma Airport
5243 kmmulti-stop
Multiple Airlines Logo
SEA  Seattle/Tacoma Airport-YKF Toronto Region of Waterloo Intl
5243 kmmulti-stop
Multiple Airlines
Booking Insights

Price, demand, and travel trends for Toronto Region of Waterloo 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.

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

Calgary (YYC) is the most popular layover for the Toronto Region of Waterloo Intl Airport to Seattle route. 77% 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 Toronto Region of Waterloo Intl Airport to Seattle?

Flights via Toronto Pearson Intl (YYZ) offer the most affordable fares, with an average round-trip price of C$ 417. Based on KAYAK data over the past 3 months.

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

Toronto Pearson Intl (YYZ) had the shortest average connection time for Toronto Region of Waterloo Intl Airport to Seattle layovers at 5h 24m over the past three months.

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

Cheapest flight

C$ 439
The most popular month to fly with an average 73% increase in traveller numbers.
One-way flight from Toronto Region of Waterloo Intl Airport to Seattle

When to book flights from Region of Waterloo Intl to Seattle

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

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

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

    Only Economy Class is available on flights from Toronto Region of Waterloo Intl Airport to Seattle.

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

    There are currently no direct flights available from Toronto Region of Waterloo Intl Airport to Seattle. Flights with 1 layover take between 8h 20m and 12h 34m in total, depending on the connection.

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

    Round-trip flights from Toronto Region of Waterloo Intl Airport to Seattle range from C$ 467 to C$ 503, with an average of C$ 483 over the past 12 months. Anything below C$ 467 counts as a good deal.

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

    One-way fares from Toronto Region of Waterloo Intl Airport to Seattle are currently higher than usual. Average one-way flight prices are about C$ 522, which is 80% above 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 averaging C$ 86 for economy cars. Top options include:

    • Fox
    • Europcar
    • Thrifty
    • Budget
    • Hertz

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

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

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

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

    • Calgary (YYC) – 77% of one-stop connections
    • Toronto Pearson Intl (YYZ) – 23% of one-stop connections

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

    Yes. Flexible dates can save you up to 32% on flights from Toronto Region of Waterloo Intl Airport to Seattle. Monday is the cheapest departure day at C$ 467 round-trip on average, while Sunday is the most expensive at C$ 681, a difference of C$ 214.

    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 Toronto Region of Waterloo Intl Airport to Seattle?

    Flying via Toronto Pearson Intl (YYZ) gives the shortest average 1-stop total travel time at 8h 20m, compared with 12h 34m via Calgary (YYC).

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

    Seattle is 3 hours behind Toronto Region of Waterloo 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.

Your guide to booking Toronto Region of Waterloo 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 Monday departure and avoid flying on Sunday. On this route, Monday flights average C$ 467, about C$ 214 less than Sunday fares (31% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Toronto Region of Waterloo Intl Airport to Seattle trip for May. Fares historically average C$ 327 round-trip in that month – typically C$ 215 less than the most expensive month, which is October (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

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

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