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ONT–SEA · Nonstop
Ontario (Ontario International Airport) to Seattle (Seattle-Tacoma International Airport).
The estimated flight time from Ontario (ONT) to Seattle (SEA) is about 2h 34m, covering 957 miles. Alaska Airlines, Delta Air Lines, and Frontier Airlines fly the route nonstop with 8-9/day departures, from 06:00 to 21:36 local time.
Plan this route| Est. flight time | Distance | Route type | Captured freq. | Market |
|---|---|---|---|---|
| ~2h 34m Estimated from great-circle distance — no tracked flights yet. | 957 mi | Nonstop | 8-9/day From the current provider sample; confirm live timetables before booking. | Domestic |
Alaska Airlines, Delta Air Lines, and Frontier Airlines operate 8-9/day flights from ONT to SEA. Terminal assignments in the captured sample are not confirmed for your flight; check the airline before travel.
| Airline | Captured frequency | Aircraft | Departures (local) |
|---|---|---|---|
| Alaska Airlines | 4-5/day | Airbus A330, Boeing 737 · Airline terminal guide (confirm for your flight) | 06:0006:0212:0412:0814:0516:0317:2617:5419:4120:1121:2021:36 |
| Delta Air Lines | 2-3/day | Embraer E-Jet · Airline terminal guide (confirm for your flight) | 06:2011:5712:0217:59 |
| Frontier Airlines | 1/day | Airbus A320 family · Seat map | 16:0316:04 |
Methodology: airline, aircraft, terminal, and departure-time details come from a full week of published airline schedules for ONT, refreshed on a rolling basis. Frequency uses 58 scheduled departures across 7 observed days; flight time is estimated from flying distance until this route has enough tracked flights for an observed average.
The estimated flight time from Ontario (ONT) to Seattle (SEA) is about 2h 34m, based on the 957-mile flying distance.
Ontario (ONT) to Seattle (SEA) is about 957 miles by air.
Yes. Alaska Airlines, Delta Air Lines, and Frontier Airlines fly nonstop from Ontario (ONT) to Seattle (SEA), with 8-9/day departures.
Alaska Airlines, Delta Air Lines, and Frontier Airlines fly nonstop from Ontario (ONT) to Seattle (SEA).
The ONT–SEA route is flown with Airbus A320 family, Airbus A330, Boeing 737, Embraer E-Jet.