Cheapest one-way flights from Las Vegas to Ontario in September from $61

Best time to book flights for Las Vegas (LAS) to Ontario (ONT) flights at AirHint

AirHint found the following cheapest one-way flights from Las Vegas (LAS) to Ontario (ONT) in September 2025 (see full year).

One-Way flights

27 Sep Frontier Airlines direct
09 Sep Frontier Airlines direct
05 Sep Frontier Airlines direct
26 Sep Frontier Airlines direct
28 Sep Frontier Airlines direct
18 Sep Frontier Airlines direct
04 Sep Frontier Airlines direct
06 Sep Southwest Airlines direct
17 Sep Southwest Airlines direct
10 Sep Southwest Airlines direct

Also check the deals for return flights from Las Vegas to Ontario in September.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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