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

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

Return flights

17 Jun - 30 Jun Southwest Airlines
03 Jun - 08 Jun Southwest Airlines
01 Jun - 04 Jun Southwest Airlines
15 Jun - 17 Jun Southwest Airlines
01 Jun - 08 Jun Southwest Airlines
17 Jun - 18 Jun Southwest Airlines
04 Jun - 05 Jun Southwest Airlines
06 Jun - 13 Jun Southwest Airlines
04 Jun - 07 Jun Southwest Airlines
20 Jun - 22 Jun Southwest Airlines
27 Jun - 03 Jul Southwest Airlines

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

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