Direct flights from St. Louis to Ontario
1 nonstop flight a week on 1 airline. Zero layovers — one hop from STL to ONT.
Flight time: about 3h10m nonstop
Which days does it fly?
When does it fly?
Departure times in St. Louis local time, from flights observed over the last 7 days.
| Flight | Departs | Duration | Days |
|---|---|---|---|
| Southwest SWA3846 | 2:15p | 3h10m | Mon |
Southwest
Find fares 🥕
The route
One hop: STL → ONTDrag to pan · scroll with ⌘/Ctrl to zoom · arrow keys when focused
Nonstop from St. Louis (STL) to Ontario (ONT)
St. Louis Lambert International Airport (STL) has 1 nonstop flight a week to Ontario (ONT), operated by Southwest. No layovers, no connections — one hop out of STL and you're there.
This route flies on Monday — check the schedule grid above before you pick a travel day. 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 St. Louis to Ontario?
The nonstop flight from St. Louis (STL) to Ontario (ONT) takes about 3h10m in the air, based on recently observed nonstop departures.