Cheapest one-way flights from Ontario to Las Vegas in September from $134

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

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

One-Way flights

18 Sep Southwest Airlines direct
18 Sep Southwest Airlines
08 Sep Southwest Airlines direct
08 Sep Southwest Airlines
11 Sep Southwest Airlines direct
11 Sep Southwest Airlines
29 Sep Southwest Airlines direct
29 Sep Southwest Airlines
21 Sep Southwest Airlines direct
21 Sep Southwest Airlines

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