$164 Find Cheap Flights from Seattle to Toronto - Compare and Save

Among airlines operating Seattle to Toronto flights:

• Alaska Airlines: offers free seat selection
• Air Canada: offers extra legroom; offers free seat selection
• United Airlines: offers free seat selection
• Hawaiian Airlines: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

2 airlines operate flights between Seattle and Toronto. The airlines offering nonstop flights on this route include:

• Air Canada
• Alaska Airlines

Flights from Seattle to Toronto usually depart from Seattle/Tacoma Intl (SEA) and may arrive at several airports in Toronto area, including Toronto Region of Waterloo Intl (YKF), Toronto Island (YTZ) and Toronto Pearson Intl (YYZ).

Here are some options for this route, based on selected ticket types and cabin classes:

• Alaska Airlines: a cabin bag and a checked bag in Economy Class
• Air Canada: a cabin bag and a checked bag in Economy Class
• Brussels Airlines: a cabin bag and a checked bag in Business Class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

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

• Economy Class
• Business Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $297 round-trip via San Francisco (SFO), compared to $454 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $30–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

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

• Calgary (YYC) - 74% of one-stop connections
• Vancouver Intl (YVR) - 11% of one-stop connections
• Chicago O'Hare Intl (ORD) - 5% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 2% of one-stop connections

Calgary (YYC) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 42% on the Seattle to Toronto route. Wednesday is the cheapest departure day at $387 round-trip on average, while Sunday is the most expensive at $659, a difference of $272. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Morning is the busiest departure period on Seattle to Toronto flights, with 100% of flights leaving in that window. Afternoon departures account for 0%, evening flights for 0%, and night flights for 0%.

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

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

• Earliest: departs at 7:45 am and lands at 12:28 pm
• Latest: departs at 8:31 am and lands at 1:14 pm.

The flight takes about 4h 43m.

Last-minute fares on this route - booked within 2 weeks of departure - run 87% above the route average of $445. Book 14 weeks before departure for the lowest fares.

A nonstop flight from Seattle to Toronto takes 4h 43m, covering 2,065 miles.

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.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $345 to $1,664. That means the highest observed fare was about 5x higher than the lowest one.

One-way fares from Seattle to Toronto are currently lower than usual. Average one-way flight prices are about $208, which is 17% below the typical average for this route.

Flying via Denver Intl (DEN) gives the shortest average 1-stop total travel time at 7h 42m, compared with 7h 50m via Salt Lake City (SLC) and 7h 54m via Detroit Metropolitan Wayne County (DTW).

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

Since Toronto is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
Near Toronto Pearson Intl Airport (YYZ) — daily rates from around $8:

• Ace
• Routes Car & Truck Rentals
• City Car & Truck Rental
• Zoom Rent A Car
• Hertz

Near Toronto Island Airport (YTZ) — daily rates from around $13:

• Hertz
• Enterprise Rent-A-Car
• National
• Advance Car And Truck Rental
• Budget

Round-trip flights from Seattle to Toronto range from $312 to $630, with an average of $445 over the past 12 months. Anything below $312 counts as a good deal.

Three airlines offer in-flight Wi-Fi on Seattle to Toronto flights:

• Alaska Airlines
• Air Canada
• JetBlue

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.