Seattle to Toronto (SEA–YYZ) — Airlines, Schedules & Connections
No flights match your filters.
No scheduled airline flights on this route — it's flown by charter / private operators (). No nonstop flights on this route. connecting options below.
Most recently operated nonstop flights — the month shown is when each was last scheduled. Most destinations remain reachable with a connection.
No discontinued nonstop flights on record for this route.
SEA–YYZ is served by 3 airlines with nonstop service. Air Canada, Alaska Airlines and Delta Air Lines lead the route. The flight covers 2,055 miles in approximately 4h 43m. Beyond nonstop, 1-stop connecting options are also available.
Airline Landscape
| Airline | Freq/wk | Aircraft | Duration | Dep OTP | Alliance | Codeshares |
|---|---|---|---|---|---|---|
| AC Air Canada Also: SN, UA | 7 | BCS3 | 4h39 | Star Alliance | SN, UA | |
| AS Alaska Airlines Also: HA, QR | 7 | 739 | 4h45 | Oneworld | HA, QR | |
| DL Delta Air Lines | 0 | – | – | SkyTeam | – |
Weekly Schedule Pattern
Connection Landscape
On-Time Performance
Other ways to reach Toronto from Seattle
| Metric | SEA→YYZ | BFI→YYZ | YYJ→YYZ |
|---|---|---|---|
| Distance from SEA | – | 5 mi | 98 mi |
| Nonstop airlines | 3 | 3 | 8 |
| Weekly flights | 25 | – | 66 |
| Flight time | 4h 43m | 4h 9m | 4h 13m |
| Departure OTP | 100% | – | – |
Travel Essentials
SEA: PDT · YYZ: EDT
When it's 6:00 PM in Seattle, it's 9:00 PM in Toronto.
US passport holders enter Canada without a visa for stays up to 6 months. No eTA is needed when arriving by air with a US passport. Passport must be valid for the duration of the stay. A return or onward ticket and proof of funds may be requested at the border.
Link Light Rail runs from downtown Seattle (Westlake station) to the airport in 38 minutes ($3.50 peak). Trains run every 6–12 minutes during peak hours from 5am to 1am. Ride-shares run $30–50 from downtown; SR-99 and I-5 can be heavily congested southbound during afternoon rush (3–7pm).
Sound Transit 574 express bus serves Tacoma ($2.50–4). Sounder commuter rail connects Tacoma to the airport area via a shuttle.
UP Express from T1 to Union Station runs every 15 minutes (25 min, CAD $12.35). The station is inside T1; take the LINK train from T3 arrivals first (free, 3 min). Taxis to downtown use a meter; expect CAD $55–75.Ride-hail (Uber, Lyft) picks up at the designated Ground Transportation area; follow signs. TTC buses run to the Kipling and Bloor–Yonge subway stations (CAD $3.30) for a longer but cheaper option. Car rental agencies are at T1 and accessible from T3 via the LINK train.
Humid continental climate. Winters are harsh (−10 to −1°C, December–March) with significant snowfall. Pearson closes runways for plowing and de-icing regularly, causing wave delays. Ice storms (freezing rain) are more disruptive than snowfall and can halt operations for hours. Buffalo-effect lake-effect snow can bring heavy accumulations with little warning.
Summers are warm and humid (22–30°C) with afternoon thunderstorms that delay departures July–August. Spring and fall are pleasant but unpredictable. YYZ connections in winter require significant schedule buffer. It is Canada's most weather-disrupted major hub.
SEA–YYZ Quick Facts
Frequently Asked Questions
Flights from SEA to YYZ
Seattle–Tacoma International Airport (SEA) and Toronto Pearson International Airport (YYZ) are connected by nonstop service from Air Canada, Alaska Airlines and Delta Air Lines. With 25 weekly departures, this is a well served route.
SEA to YYZ Flight Duration and Schedule
Nonstop flight time from SEA to YYZ is about 4 hours 43 minutes gate to gate. The route covers a distance of 2,055 miles (3,307 km). There are approximately 25 weekly flights outbound and 25 return, totaling 50 flights per week in both directions.
Connecting Options and Alternatives
1-stop connecting options are also available, commonly via Vancouver, Edmonton and Minneapolis–Saint Paul. Two-stop connections are also available via intermediate hubs. Nearby alternative airports include Seattle (BFI) and Victoria (YYJ).