Cheapest return flights from Ontario to Las Vegas in August from $250

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

Return flights

13 Aug - 15 Aug Southwest Airlines
22 Aug - 29 Aug Southwest Airlines
25 Aug - 30 Aug Southwest Airlines
07 Aug - 17 Aug Southwest Airlines
11 Aug - 17 Aug Southwest Airlines
22 Aug - 25 Aug Southwest Airlines
25 Aug - 25 Aug Southwest Airlines
05 Aug - 15 Aug Southwest Airlines
11 Aug - 11 Aug Southwest Airlines
18 Aug - 20 Aug Southwest Airlines
21 Aug - 08 Sep Southwest Airlines
24 Aug - 04 Sep Southwest Airlines

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

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