# St Louis to Ontario flights

Page: https://www.routavio.com/flights/st-louis-to-ontario

## About this route

Explore the fares we observed from St Louis to Ontario. Prices move often, so pick your dates to see the latest options.

- Route distance: 2,500 km
- Typical journey time: 15h 30m
- Airlines seen: Alaska Airlines, Frontier Airlines, Southern Airways Express, Southwest Airlines, United Airlines
- Seen on fares with a connection: Frontier Airlines, Alaska Airlines, United Airlines, Southern Airways Express
- Alternative airports: SUS

- Cheapest checked fare: €65 one way (checked 6 Nov 2026, departing 4 Dec 2026)

## Frequently asked

### How much is a flight from St Louis to Ontario?

The lowest fare Routavio has observed is €65, found on 6 Nov 2026.

### Are there direct flights from St Louis to Ontario?

Our data holds no non-stop flight from St Louis to Ontario. The fares on this page include at least one stop.

### Which airlines fly from St Louis to Ontario?

Routavio has seen these carriers on the route: Alaska Airlines, Frontier Airlines, Southern Airways Express, Southwest Airlines, United Airlines.

### How long does the flight from St Louis to Ontario take?

Across the 114 fares Routavio observed, the average journey time is 17h 30m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.

### How many of the observed St Louis to Ontario fares were non-stop?

None of the 114 fares we observed was non-stop; every one included at least one stop. That describes our observations, not every flight that operates.

Route data last updated by Routavio on 6 November 2026