Flights operate between Ontario (ONT) and SeaTac (SEA).
3 airlines operate this route with 4-9 flights daily flights.
Average flight time is 2h 40m - 3h 07m.
Route distance is 962 miles (1548 km).
Route Distance
962 miles (1548 km)
Average Duration
2h 40m - 3h 07m
Airlines Operating This Route
Alaska Airlines, Delta Air Lines, Frontier Airlines
Flight Frequency
Daily Flights
4-9 flights
Weekly Flights
52
Typical Departure Time Ranges
Earliest Departure
06:00
Latest Departure
19:21
Flight Schedule & Filters
Flight Schedule Calendar
Loading calendar...
Direct (non-stop) flights from Ontario (ONT) to SeaTac (SEA)
Direct (non-stop) flights operate between Ontario (ONT) and SeaTac (SEA). This popular route is operated by 3 airlines, offering multiple daily departures.• Flight Duration: 2h 40m - 3h 07m (average flight time)• Distance: 962 miles (1548 km) (air miles between airports)• Daily Flights: 4-9 flights (scheduled departures per day)
Ontario (ONT)
US
SeaTac (SEA)
US
FLIGHT TIME
2h 40m - 3h 07m
FLIGHT DISTANCE
962 miles (1548 km)
2h 53m - 3h 4m
06:00
19:21
962 miles (1548 km)
April
3 (Show)
52
Flight Schedule
Loading calendar...
Airlines with direct flights from Ontario (ONT) to SeaTac (SEA)
Weather at SeaTac (SEA)
Loading weather charts...
Frequently Asked Questions
Do flights operate between ONT and SEA?
Yes. 8 direct flights operate between Ontario (ONT) and Seattle (SEA).
Which airlines operate this route?
3 airlines operate this route: Alaska Airlines, Delta Air Lines, Frontier Airlines.
How many flights operate daily?
4-9 flights flights operate daily on this route.
What is the average flight duration?
The average flight duration is 2h 40m - 3h 07m.
Is this route operated year-round?
This route operates with 4-9 flights daily flights.
Route data verified regularly by Triposia Travel Research Team.