Cheapest one-way flights from Ontario to Las Vegas in September from $125

AirHint found the following cheapest one-way flights from Ontario (ONT) to Las Vegas (LAS) in September 2026 (see full year).

One-Way flights

24 Sep Southwest Airlines direct
24 Sep Southwest Airlines
17 Sep Southwest Airlines direct
17 Sep Southwest Airlines
14 Sep Southwest Airlines direct
14 Sep Southwest Airlines
01 Sep Southwest Airlines direct
01 Sep Southwest Airlines
22 Sep Southwest Airlines direct
22 Sep Southwest Airlines

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

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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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