$220 Find Cheap Flights from Toronto to Seattle - Compare and Save

Among airlines operating Toronto Pearson Intl Airport to Seattle flights:

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

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

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

• Air Canada
• Alaska Airlines

Flights from Toronto Pearson Intl Airport to Seattle usually depart from Toronto Pearson Intl (YYZ) and arrive at Seattle/Tacoma Intl (SEA).

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
• Jazz: a cabin bag and a checked bag in Economy Class

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

Two cabin classes are available on flights from Toronto Pearson Intl Airport to Seattle:

• Economy Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $263 round-trip via Montreal Pierre Elliott Trudeau Intl (YUL), compared to $384 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $25–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737 MAX 9 family is used most often on this route, operated mainly by Alaska Airlines. Other aircraft seen on the route include Airbus A220-300 variants.

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

• Calgary (YYC) - 71% of one-stop connections
• Vancouver Intl (YVR) - 18% of one-stop connections
• Chicago O'Hare Intl (ORD) - 6% 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 24% on the Toronto Pearson Intl Airport to Seattle route. Tuesday is the cheapest departure day at $344 round-trip on average, while Sunday is the most expensive at $451, a difference of $107. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Toronto Pearson Intl Airport to Seattle route, 29% of flights were delayed in the past 3 months, with delays averaging 2 hours 34 minutes.

Evening is the busiest departure period on Toronto Pearson Intl Airport to Seattle flights, with 100% of flights leaving in that window. Morning departures account for 0%, afternoon flights for 0%, and night flights for 0%.

Some of the most popular sights in Seattle are Pike Place Market, Pier 66 and Lumen Field. These are among the most viewed places in Seattle on KAYAK.

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

• Earliest: departs at 4:55 pm and lands at 10:23 pm
• Latest: departs at 7:20 pm and lands at 12:48 am.

The flight takes about 5h 28m.

Last-minute fares on this route - booked within 2 weeks of departure - run 80% above the route average of $381. Book 10 weeks before departure for the lowest fares.

A nonstop flight from Toronto Pearson Intl Airport to Seattle takes 5h 28m, covering 2,054 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 $305 to $1,369. That means the highest observed fare was about 4x higher than the lowest one.

One-way fares from Toronto Pearson Intl Airport to Seattle are currently lower than usual. Average one-way flight prices are about $229, which is 17% below the typical average for this route.

Afternoon flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

Flying via Chicago O'Hare Intl (ORD) gives the shortest average 1-stop total travel time at 7h 59m, compared with 8h 02m via Vancouver Intl (YVR) and 8h 10m via Salt Lake City (SLC).

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

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around $4 for economy cars. Top options include:
• Fox
• Europcar
• Thrifty
• Budget
• Dollar

Round-trip flights from Toronto Pearson Intl Airport to Seattle range from $278 to $528, with an average of $381 over the past 12 months. Anything below $278 counts as a good deal.

Two airlines offer in-flight Wi-Fi on Toronto Pearson Intl Airport to Seattle flights:

• • Alaska Airlines
• • Air Canada