Cheapest return flights from Las Vegas to Ontario in September from $268

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

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

Return flights

09 Sep - 11 Sep Southwest Airlines
07 Sep - 08 Sep Southwest Airlines
11 Sep - 11 Sep Southwest Airlines
09 Sep - 16 Sep Southwest Airlines
10 Sep - 13 Sep Southwest Airlines
02 Sep - 03 Sep Southwest Airlines
02 Sep - 02 Sep Southwest Airlines

Also check the deals for one-way 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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