Seattle-Tacoma to Toronto Pearson
2055 miles great-circle distance, typically flown in 4h 32m with 8 airlines operating direct service from Seattle-Tacoma (SEA) to Toronto Pearson (YYZ). Cheapest fares are usually in January (around $249 return), with peak prices in August (around $747). Departures on a Tuesday tend to undercut weekend prices on this corridor.
Flying from Seattle-Tacoma
Seattle-Tacoma is Alaska Airlines' principal hub and Delta's growing Pacific Northwest base. The Link Light Rail Red Line runs from the airport's elevated station directly to Westlake in downtown Seattle in 38 minutes for $3.25 — possibly the easiest big-city transfer in the country. International long-haul has expanded sharply post-2023 with new direct service to Tokyo, Seoul, Frankfurt, London Heathrow and Auckland. Weather delays are rare; SEA is one of the most operationally reliable winter airports in the US.
Arriving in Toronto
Toronto Pearson is 22 km northwest of downtown Toronto, with the UP Express train reaching Union Station in 25 minutes for CA$12.35. Air Canada is the dominant carrier; US carriers serve YYZ heavily as the largest cross-border destination. Fares from US East Coast and Midwest are competitive year-round; peak demand is around Caribana (early August) and the Toronto International Film Festival (early September).
Who flies SEA to YYZ?
| Airline | IATA | Flight time | Cabin |
| Alaska Airlines | AS | 4h 32m | Economy |
| Delta Air Lines | DL | 4h 32m | Economy |
| Southwest Airlines | WN | 4h 32m | Economy |
| American Airlines | AA | 4h 32m | Economy |
| United Airlines | UA | 4h 32m | Economy |
| JetBlue Airways | B6 | 4h 32m | Economy |
| Spirit Airlines | NK | 4h 32m | Economy |
| Hawaiian Airlines | HA | 4h 32m | Economy |
8 carriers fly direct on this corridor. Frequencies vary by season — summer and winter holiday peaks see additional flights.
Best time to fly SEA→YYZ
Synthesised from 12-month price aggregates. Cheapest months in green, peak in red.
Estimated baseline. Prices update on a 30-day cadence as Travelpayouts data refreshes. Cheapest day-of-week typically Tuesday.
Seattle to Toronto FAQs
Direct flights from Seattle-Tacoma (SEA) to Toronto Pearson (YYZ) take approximately 4h 32m for the 2055-mile journey, plus 30–60 minutes of taxi, climb and descent. Total airport-to-airport time depends on cruise winds and air-traffic queueing on approach.
January is typically the cheapest month on this route, with one-way fares from $249. August is the peak — expect prices 2–3× higher. Book 4–8 weeks ahead for best fares; last-minute prices on this corridor rise sharply inside two weeks of departure.
8 carriers operate direct service from Seattle-Tacoma (SEA) to Toronto Pearson (YYZ): Alaska Airlines, Delta Air Lines, Southwest Airlines, American Airlines, United Airlines and 3 more. Frequencies vary by season and carrier — Alaska Airlines typically operates the highest weekly count on this corridor.
No eTA required for US citizens, but a US passport (or NEXUS card / Enhanced Driver License) is required for air travel. Always check travel.state.gov for the latest entry requirements before booking.
Toronto Pearson (YYZ) is the primary international airport for Toronto. Allow 30–60 minutes for the ground transfer by train, express bus, taxi or rideshare depending on traffic and time of day. See the airport's official website for current train and shuttle timetables.