AirHint found the following cheapest return flights from Ontario (ONT) to Las Vegas (LAS) in June 2026 (see full year).
Return flights
| 09 Jun - 16 Jun | Southwest Airlines | ||
| 04 Jun - 13 Jun | Southwest Airlines | ||
| 19 Jun - 22 Jun | Southwest Airlines | direct |
Also check the deals for one-way flights from Ontario to Las Vegas in June.
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