New calculation
Flight distance & time
Seattle Tacoma International Airport → Ontario International Airport
SEAONT
- Distance
- 1,540 km · 956 mi
- Flight time
- 02h 40m
- CO₂ per passenger
- 138 kg
This Seattle Tacoma International Airport → Ontario International Airport route is 1,540 km (956 mi) end to end. The estimated flight time is 02h 40m, and a passenger's share of CO₂ works out at roughly 138 kg.
See the reverse route: Ontario International Airport → Seattle Tacoma International Airport
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Your route
- FromSEASeattle Tacoma International AirportSeattle, Washington
- ToONTOntario International AirportOntario, California
Flight map
Track your lifetime distance flown across every trip.
Route service
Average daily flights~8 flights/day
Airlines on this route
Alaska AirlinesATIDelta Air LinesFrontier Airlines
Common questions
Seattle Tacoma International Airport to Ontario International Airport FAQ
How far is Seattle Tacoma International Airport from Ontario International Airport?
Seattle Tacoma International Airport (SEA) and Ontario International Airport (ONT) are 1,540 km (956 mi) apart, measured along the great-circle route.
How long is the flight from Seattle Tacoma International Airport to Ontario International Airport?
A direct SEA–ONT flight covers the distance in about 02h 40m, though the exact time shifts with aircraft type and winds.
How much CO₂ does a flight from Seattle Tacoma International Airport to Ontario International Airport produce?
A passenger's share of CO₂ on the SEA–ONT route is roughly 138 kg.
Which airlines fly from Seattle Tacoma International Airport to Ontario International Airport?
Alaska Airlines, ATI, Delta Air Lines, Frontier Airlines operate scheduled service between SEA and ONT.
Flight distance and time are estimates for ideal conditions — actual figures vary with aircraft type, routing and weather.
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