The cheapest times to fly from SEA to YYZ are

  • September 3rd to March 11th (except the weeks of December 10th and December 17th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from SEA to YYZ is late January and early February. Prices can be as high as $845 for Sunday flights during late June, or as low as $393 for Wednesday flights around late January and early February.


When to Fly to Toronto

Flying from Seattle, WA (SEA) to Toronto (YYZ) will usually cost between $419 to $652 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late January and early February with an average ticket price of $431. Due to high demand the most expensive time to fly is late June, with an average price of $667. Planning your trip to low-cost times can easily save you $236 on economy flights and even more on first-class flights. Generally, any price below $480 can be considered a good price for a round-trip SEA to YYZ flight.

See below for a graph of average weekly prices for the SEA to YYZ route. All prices are for round-trip tickets in USD.

SEA to YYZ Flight Prices

Compared to other flights, the SEA to YYZ flight is much cheaper than the average and costs much less than the average flight leaving from Seattle. The average price per mile (for a direct flight) is $0.15, which is far below average.


Flight Prices by Day of the Week

Wednesday is usually the cheapest day to fly to YYZ, and Tuesday the cheapest day to fly back into SEA. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $57 (11%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Wednesday and returning a week later will cost an average of $475. Return trip prices are from the YYZ to SEA flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from SEA to YYZ can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 4 hour 41 minutes may be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is a nonstop flight from SEA to YYZ while comparing.

Destination alternative #1: Buffalo Niagara International Airport (BUF) in Buffalo, NY

  • 68 miles (109 km) away from YYZ
  • Usually 25.10% less expensive than YYZ
  • 1-layover flights available

See SEA to BUF flights

Destination alternative #2: Greater Rochester International Airport (ROC) in Rochester, NY

  • 106 miles (171 km) away from YYZ
  • Usually 19.79% less expensive than YYZ
  • 1-layover flights available

See SEA to ROC flights

Destination alternative #3: Erie International/Tom Ridge Field Airport (ERI) in Erie, PA

  • 114 miles (183 km) away from YYZ
  • Usually 16.04% less expensive than YYZ
  • 1-layover flights available

See SEA to ERI flights


Flight Questions Answered

Still have questions about flying from SEA to YYZ? We’ve got answers.

Which airlines fly this route?

You can find 12 major airlines flying this route most often: Aeromexico, Air Canada, Alaska, American, Delta, Emirates, Fiji Airways, Korean Air, Qantas, United, Virgin Atlantic, WestJet, and potentially more during busy seasons.

How far away is it from Lester B. Pearson International Airport to Seattle/Tacoma International Airport?

The distance between the two airports is roughly 2054 miles or 3306 kilometers.

How long does it take to fly from SEA to YYZ?

The real-world flight time for a nonstop SEA to YYZ flight is about 4 hour 41 minutes.

How many flights go between Seattle, WA and Toronto?

It depends on the day of the week and the date, but a typical day might have around 93 available flights from SEA to YYZ.


Airport Location Info


Departing Airport

Origination codeSEA
Origination airport nameSeattle/Tacoma International Airport
CitySeattle, WA
Countrythe United States

Return Airport

Destination codeYYZ
Destination airport nameLester B. Pearson International Airport


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.