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

11 May Southwest Airlines direct
11 May Southwest Airlines
01 May Southwest Airlines direct
01 May Southwest Airlines
19 May Southwest Airlines direct
19 May Southwest Airlines
24 May Southwest Airlines direct
24 May Southwest Airlines
30 May Southwest Airlines direct
30 May Southwest Airlines

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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