Cheapest one-way flights from Ontario to Las Vegas in May from $44

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

One-Way flights

02 May Frontier Airlines direct
07 May Frontier Airlines direct
10 May Frontier Airlines direct
01 May Frontier Airlines direct
14 May Frontier Airlines direct
05 May Frontier Airlines direct
04 May Southwest Airlines direct
28 May Southwest Airlines direct
28 May Southwest Airlines
27 May Southwest Airlines direct

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

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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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