Cheapest one-way flights from Ontario to Las Vegas in May from $125

AirHint found the following cheapest one-way flights from Ontario (ONT) to Las Vegas (LAS) in May 2026 (see full year).

One-Way flights

04 May Southwest Airlines direct
06 May Southwest Airlines direct
04 May Southwest Airlines
06 May Southwest Airlines
27 May Southwest Airlines direct
28 May Southwest Airlines direct
18 May Southwest Airlines direct
18 May Southwest Airlines
07 May Southwest Airlines direct
29 May Southwest Airlines direct

Also check the deals for return flights from Ontario to Las Vegas in May.

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