OntariotoSeattleFlight Time
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 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 Ontario to Seattle
Alaska Airlines, Delta Air Lines, and Frontier Airlines operate 8-9/day flights from ONT to SEA. Departures leave from Terminal 2 at ONT.
- First departure
- 06:00
- Last departure
- 21:36
- Cadence
- ~hourly
- Scheduled departure times
- 17
| Airline | Captured daily freq. | Aircraft | Departures (local) |
|---|---|---|---|
| Alaska Airlines | 4-5/day | Airbus A330, Boeing 737 · Terminal 2 |
Aircraft on this route
Flying the other way?
SEA to ONT 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 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.
Route FAQ
How long is the flight from Ontario to Seattle?
The estimated flight time from Ontario (ONT) to Seattle (SEA) is about 2h 34m, based on the 957-mile flying distance.
How far is Ontario from Seattle?
Ontario (ONT) to Seattle (SEA) is about 957 miles by air.
Are there nonstop flights from Ontario to Seattle?
Yes. Alaska Airlines, Delta Air Lines, and Frontier Airlines fly nonstop from Ontario (ONT) to Seattle (SEA), with 8-9/day departures.
Which airlines fly from Ontario to Seattle?
Alaska Airlines, Delta Air Lines, and Frontier Airlines fly nonstop from Ontario (ONT) to Seattle (SEA).
What aircraft fly from Ontario to Seattle?
The ONT–SEA route is flown with Airbus A320 family, Airbus A330, Boeing 737, Embraer E-Jet.
Route hubs
Nearby airport options
Near Ontario
- SNA - Santa AnaJohn Wayne/Orange County Airport · 30 mi from ONTFlights from SNA
- BUR - BurbankBob Hope Airport · 44 mi from ONTFlights from BUR
- LAX - Los AngelesLos Angeles International Airport · 47 mi from ONTFlights from LAX