Direct flights from Seattle to Ontario
51 nonstop flights a week on 3 airlines. Zero layovers — one hop from SEA to ONT.
Flight time: about 2h12m nonstop
Which days does it fly?
When does it fly?
Departure times in Seattle local time, from flights observed over the last 7 days.
| Flight | Departs | Duration | Days |
|---|---|---|---|
| SkyWest SKW4070 | 8:28a | 2h4m | Wed, Sun |
| SkyWest SKW4070 | 8:36a | 2h7m | Fri |
| Alaska ASA1364 | 8:39a | 2h22m | Mon, Tue, Sat, Sun |
| SkyWest SKW4070 | 8:45a | 2h5m | Thu |
| Alaska ASA1364 | 8:48a | 2h20m | Thu–Fri |
| SkyWest SKW4070 | 8:58a | 1h56m | Mon–Tue |
| Alaska ASA1364 | 9:06a | 2h13m | Wed |
| Frontier FFT2276 | 11:00a | 2h12m | Sat |
| Frontier FFT2276 | 11:11a | 2h6m | Wed, Thu, Sun |
| Frontier FFT2276 | 11:17a | 2h6m | Mon |
| Alaska ASA571 | 11:34a | 2h30m | Sat |
| Alaska ASA571 | 11:37a | 2h23m | Mon |
| Frontier FFT2276 | 11:37a | 2h9m | Fri |
| Alaska ASA571 | 12:00p | 2h5m | Wed |
| Alaska ASA571 | 12:21p | 2h1m | Tue |
| Alaska ASA571 | 12:27p | 2h12m | Thu, Fri, Sun |
| SkyWest SKW4031 | 2:43p | 2h12m | Mon, Thu, Sun |
| SkyWest SKW4031 | 2:52p | 2h3m | Wed |
| SkyWest SKW4031 | 3:11p | 2h10m | Tue, Fri, Sat |
| Alaska ASA592 | 4:40p | 2h13m | Mon, Wed, Thu, Sat |
| Alaska ASA592 | 4:53p | 2h12m | Tue |
| Alaska ASA592 | 5:00p | 2h20m | Fri |
| Alaska ASA592 | 5:59p | 2h24m | Sun |
| SkyWest SKW3884 | 7:54p | 2h22m | Sat |
| SkyWest SKW3884 | 8:01p | 2h15m | Wed, Fri, Sun |
| SkyWest SKW3884 | 8:15p | 2h7m | Thu |
| Alaska ASA489 | 8:54p | 2h | Mon |
| Alaska ASA489 | 9:03p | 2h13m | Sun |
| SkyWest SKW3884 | 9:21p | 1h52m | Mon |
| SkyWest SKW3884 | 9:32p | 2h10m | Tue |
| Alaska ASA489 | 9:58p | 2h18m | Fri |
| Alaska ASA489 | 10:59p | 2h15m | Thu |
DeltaThe route
One hop: SEA → ONTDrag to pan · scroll with ⌘/Ctrl to zoom · arrow keys when focused
Nonstop from Seattle (SEA) to Ontario (ONT)
Seattle–Tacoma International Airport (SEA) has 51 nonstop flights a week to Ontario (ONT), operated by Alaska, Delta and Frontier. No layovers, no connections — one hop out of SEA and you're there.
This route flies every day of the week, so any travel day works. Route data updated October 2026 from observed departures.
Route data updated October 2026 from observed flight departures. Schedules change — always confirm with the airline before booking.
How long is the flight from Seattle to Ontario?
The nonstop flight from Seattle (SEA) to Ontario (ONT) takes about 2h12m in the air, based on recently observed nonstop departures.
How long does it take to drive from Seattle to Ontario?
Driving from Seattle to Ontario takes about 17h 59m behind the wheel — roughly 1,170 miles, or about 2 days of real driving. The nonstop flight takes about 2h12m.