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

Return flights

15 Jul - 16 Jul	Southwest Airlines
22 Jul - 30 Jul	Southwest Airlines
20 Jul - 24 Jul	Southwest Airlines
30 Jul - 02 Aug	Southwest Airlines

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

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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Cheapest return flights from Las Vegas to Ontario in July from $271

Return flights