Seattle (SEA) to Toronto (YYZ) flights
2 airlines fly nonstop from Seattle (SEA) to Toronto (YYZ): Air Canada and Alaska Airlines. The two airports are 2,055 miles (3,307 km) apart. Air Canada is in Star Alliance and Alaska Airlines is in oneworld. There are also 46 ways to fly it with one stop, through Minneapolis, Calgary and Kelowna and more.
Airlines flying nonstop from SEA to YYZ
- Air CanadaStar Alliance · bookable with 12 programsWho books it
- Alaska Airlinesoneworld · bookable with 9 programsWho books it
Book SEA to YYZ with points
Loyalty programs that can book at least one of the nonstop airlines, from the Award Booking Guide.
- Air Canada AeroplanBooks Air Canada
- Air New Zealand AirpointsBooks Air Canada
- Alaska Atmos RewardsBooks Alaska Airlines
- American AAdvantageBooks Alaska Airlines
- ANA Mileage ClubBooks Air Canada
- Avianca LifeMilesBooks Air Canada
- British Airways ClubBooks Alaska Airlines
- Cathay Pacific Asia MilesBooks Alaska Airlines
- Emirates SkywardsBooks Air Canada
- EVA Air Infinity MileageLandsBooks Air Canada
- Finnair PlusBooks Alaska Airlines
- Iberia ClubBooks Alaska Airlines
- JAL Mileage BankBooks Alaska Airlines
- Lufthansa Miles & MoreBooks Air Canada
- Qantas Frequent FlyerBooks Alaska Airlines
- Qatar Airways Privilege ClubBooks Alaska Airlines
- Singapore Airlines KrisFlyerBooks Air Canada
- TAP Miles&GoBooks Air Canada
- Thai Royal Orchid PlusBooks Air Canada
- Turkish Airlines Miles&SmilesBooks Air Canada
- United MileagePlusBooks Air Canada
SEA to YYZ with one stop
46 connections, most direct first. 2-stop routings and flight times are in Routes with Pro.
- Via Minneapolis (MSP)Delta Air Lines and Sun Country Airlines the whole way
- Via Calgary (YYC)WestJet the whole way
+1
- Via Kelowna (YLW)Alaska Airlines and WestJet, then Air Canada and Porter Airlines
- Via Detroit (DTW)Delta Air Lines the whole way
- Via Chicago (ORD)American Airlines and United Airlines the whole way
+1
- Via Victoria (YYJ)Alaska Airlines, then Air Canada and Porter Airlines
- Via Vancouver (YVR)Air Canada the whole way+1
- Via Cleveland (CLE)Alaska Airlines, then Air Canada
- Via Edmonton (YEG)Alaska Airlines, then Air Canada, Flair Airlines and 2 more+1
- Via Indianapolis (IND)Alaska Airlines and American Airlines, then Air Canada
- Via Columbus (CMH)Alaska Airlines, then Air Canada
- Via Denver (DEN)United Airlines the whole way+3
- Via Pittsburgh (PIT)Alaska Airlines and American Airlines, then Air Canada
- Via Salt Lake City (SLC)Delta Air Lines the whole way
- Via Saint Louis (STL)Alaska Airlines and Southwest Airlines, then Air Canada
SEA to YYZ: common questions
Which airlines fly nonstop from SEA to YYZ?
Air Canada (Star Alliance) and Alaska Airlines (oneworld) fly nonstop from Seattle (SEA) to Toronto (YYZ).
How far is Seattle from Toronto by plane?
Seattle (SEA) and Toronto (YYZ) are 2,055 miles (3,307 km) apart along the great circle, the shortest path a flight can take. Connections add distance on top.
Which points programs can book SEA to YYZ award flights?
21 programs can book at least one of the nonstop airlines: Air Canada Aeroplan, Air New Zealand Airpoints, Alaska Atmos Rewards, American AAdvantage, ANA Mileage Club, Avianca LifeMiles, British Airways Club, Cathay Pacific Asia Miles and 13 more. Which flights each can book depends on its partners, so check the airline before you transfer points.
How many miles does SEA to YYZ cost?
It depends on the program: each prices the route from its own chart or dynamically. The Award Flight Pricer compares 30+ programs for SEA to YYZ with taxes and fees.
Where can I connect between Seattle and Toronto?
The most direct connections are through Minneapolis (MSP), Calgary (YYC), Kelowna (YLW), Detroit (DTW) and Chicago (ORD). On 19 of them the same airline flies both flights, for example Delta Air Lines through Minneapolis.
More routes
Routes are scheduled nonstop flights. The route data is refreshed monthly; this list was last checked November 11, 2026. Seasonal routes and new launches can be missing or end early, so confirm with the airline before you book. Distances are great-circle, the shortest path between the two airports.