Cheap flights from Seattle to Toronto from $184

The cheapest month to fly to Toronto Pearson Intl Airport from Seattle is in January. Flight prices, which tend to average around $265, are often lower during this time because this is during the off-season. If you don’t want to visit Toronto Pearson Intl Airport in January, then you should wait until February to fly from Seattle, when ticket prices are also cheap, with an average price of $277.

The cheapest day to depart from Seattle to Toronto Pearson Intl Airport is on a Tuesday when prices can be found for as low as $525. The most expensive day to fly to Toronto Pearson Intl Airport is Sunday, with ticket prices averaging around $783.

Fly from Seattle/Tacoma Intl to Toronto Pearson Intl for the best Seattle/Tacoma Intl - Toronto Pearson Intl flight prices

You are more likely to see cheaper flights to Toronto Pearson Intl Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Toronto Pearson Intl Airport for around $394 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Toronto Pearson Intl Airport from Seattle for as low as $318 on momondo.

There are 4 cabin classes available to choose from on Seattle to Toronto Pearson Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

As of August 2026, prices for Seattle to Toronto Pearson Intl Airport flights are approximately 34% more expensive when compared to flights at the same time last year.

Alaska Airlines and Delta are the most popular carriers operating from Seattle/Tacoma Intl to Toronto Pearson Intl

Alaska Airlines, WestJet and Air Canada are the top three most popular airlines that fly to Toronto Pearson Intl Airport from Seattle according to our data. Alaska Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Toronto Pearson Intl Airport. Keep in mind that there are 5 different airlines that fly to Toronto Pearson Intl Airport on a routine basis, so you have a few additional options to choose from.

Calgary (YYC) was the most common stop: 80% of momondo users choosing 1-stop flights on this route connected there.

Flights via Salt Lake City (SLC) offer the lowest average round-trip price of $293.

Flights connecting via Salt Lake City (SLC) have the shortest average one-way travel time: 8h 07m.

Salt Lake City (SLC) has the shortest average layover time for this route: 1h 26m.

As of August 2026, there are 4 flights per day flying from Seattle to Toronto Pearson Intl Airport. The most common time of day flights depart is 8:00AM, with 100% of flights taking off at noon.

As of August 2026, there are 32 flights per week flying from Seattle to Toronto Pearson Intl Airport. The most common day of the week flights depart is Mon, with 16% of flights taking off on this day.