SeattletoOntarioFlight Time
SEA–ONT · Nonstop
Seattle (Seattle-Tacoma International Airport) to Ontario (Ontario International Airport).
The estimated flight time from Seattle (SEA) to Ontario (ONT) 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 08:25 to 21:22 local time.
Plan this routeAt a glance
| 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 |
Airlines on this route
Nonstop airlines from Seattle to Ontario
Alaska Airlines, Delta Air Lines, and Frontier Airlines operate 8-9/day flights from SEA to ONT.
- First departure
- 08:25
- Last departure
- 21:22
- Cadence
- ~hourly
- Scheduled departure times
- 17
| Airline | Captured daily freq. | Aircraft | Departures (local) |
|---|---|---|---|
| Alaska Airlines | 4-5/day | Boeing 737 · Seat map | 08:3008:33 |
Aircraft on this route
Flying the other way?
ONT to SEA flights — 8-9/day on 3 airlines →Methodology: airline, aircraft, terminal, and departure-time details come from a full week of published airline schedules for SEA, 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.
Route FAQ
How long is the flight from Seattle to Ontario?
The estimated flight time from Seattle (SEA) to Ontario (ONT) is about 2h 34m, based on the 957-mile flying distance.
How far is Seattle from Ontario?
Seattle (SEA) to Ontario (ONT) is about 957 miles by air.
Are there nonstop flights from Seattle to Ontario?
Yes. Alaska Airlines, Delta Air Lines, and Frontier Airlines fly nonstop from Seattle (SEA) to Ontario (ONT), with 8-9/day departures.
Which airlines fly from Seattle to Ontario?
Alaska Airlines, Delta Air Lines, and Frontier Airlines fly nonstop from Seattle (SEA) to Ontario (ONT).
What aircraft fly from Seattle to Ontario?
The SEA–ONT route is flown with Airbus A320 family, Boeing 737, Embraer E-Jet.
Route hubs
Nearby airport options
Near Ontario
- SNA - Santa AnaJohn Wayne/Orange County Airport · 30 mi from ONTFlights to SNA
- BUR - BurbankBob Hope Airport · 44 mi from ONTFlights to BUR
- LAX - Los AngelesLos Angeles International Airport · 47 mi from ONTFlights to LAX