Flight Time from Seattle to Toronto

At the moment, you can catch a nonstop flight from Seattle to Toronto with the following airlines, including: Alaska Airlines Air Canada WestJet Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

It takes around 5 hours 5 minutes to fly from Seattle (SEA) to Toronto (YTO).

By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to Toronto is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

Based on Trip.com data in the past 4 weeks, there is 14 flight per week flying from Seattle to Toronto. You can check the weekly schedule for popular airlines on this route below: Air Canada: S/M/T/W/T/F/S -- AC542 (08:22)

The cheapest months to fly from Seattle to Toronto is October, when demand for travel is lower.

After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Seattle to Toronto on December 13, 2025 with WestJet, with prices starting at €197.

You can land at any one of the following hubs in Toronto, with Seattle–Tacoma International Airport to Toronto Pearson International Airport (SEA-YYZ) is by far the most common option on this route: Toronto Pearson International Airport (YYZ) Billy Bishop Toronto City Airport (YTZ) John C. Munro Hamilton International Airport (YHM) Region Of Waterloo International Airport (YKF).

The time difference between Toronto and Seattle is 3h.

Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.