Cheapest return flights from Las Vegas to Ontario in August from $251

AirHint found the following cheapest return flights from Las Vegas (LAS) to Ontario (ONT) in August 2026 (see full year).

Return flights

29 Aug - 31 Aug Southwest Airlines
18 Aug - 18 Aug Southwest Airlines

Also check the deals for one-way flights from Las Vegas to Ontario in August.

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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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