SEA → YYZSeattle to Toronto

live

Direct flights from Seattle (SEA) to Toronto (YYZ): 14 nonstop departures observed each week across 2 airlines. 100% of the last 10 operated flights arrived within 15 minutes of schedule. The median arrival is 38 minutes early. No cancellations were recorded across the 10 tracked flights. The nonstop covers 3,307 km, an estimated 4 hours 44 minutes in the air. Measured by Pro Flight Search from live flight boards at Seattle and Toronto. Updated 16 September 2026 at 20:22 UTC.

SEA Seattle busy · +17
YYZ Toronto smooth · +0
3,307 km · ~4h 44m est.
dep bank 07:52–08:0014x weekly
Runs reliable · 2 airlines · 14x weekly · nonstop
100% on time

of the last 10 operated SEA → YYZ flights arrived within 15 minutes

Median arrival delay is −38 min. 0 of 10 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−38 minacross the last 10 operated legs
Flight time~4h 44mestimated from route distance
Weekly departures14x2 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 10

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Air CanadaAlaska Airlines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
Air CanadaAC100% on time

Flights AC540 08:00 daily

Alaska AirlinesAS100% on time

Flights AS385 varies daily

History

operated legs · board outcomes
09-16AC540arrived−38
09-16AS385arrived−44
09-15AC540arrived−34
09-15AS385arrived−55
09-14AC540arrived−28
09-14AS385arrived−31
09-13AC540arrived−37
09-13AS385arrived−50
09-12AC540arrived−49
09-12AS385arrived−62

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
SEASeattle +17 min busy 🌤 few clouds · N 11 kt Full SEA delay board →
YYZToronto +0 min smooth 🌤 mostly cloudy · N 11 kt Full YYZ delay board →

Weather lens

Current conditions put the pressure at YYZ: 41% odds of a 15+ minute delay and around +12 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Seattle to Toronto route actually runs

Pro Flight Search records official board updates for nonstop SEA to YYZ flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — Seattle (SEA) to Toronto (YYZ) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/SEA-YYZ
How we measure this →

SEA to YYZ questions

Is SEA–YYZ running on time right now?

Smooth skies ahead. The departure side at SEA is the weaker end, route health score 89/100. The airports section above carries the live status and delay window at both ends.

How long is the flight from SEA to YYZ?

Great-circle distance is 3,307 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 263–313 min gate-to-gate on this route.

How often does SEA–YYZ fly?

2 carriers operate this route, around 14 flights a week between them. Compare carrier days and times in the airline list above.

What does the route health score measure?

A blend of departure-side delay at SEA and arrival-side delay at YYZ, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.