Cheapest return flights from Las Vegas to Ontario in May from $75

Best time to book flights for Las Vegas (LAS) to Ontario (ONT) flights at AirHint

AirHint found the following cheapest return flights from Las Vegas (LAS) to Ontario (ONT) in May 2025 (see full year).

Return flights

14 May - 21 May Frontier Airlines direct
30 May - 31 May Frontier Airlines direct
16 May - 17 May Frontier Airlines direct
16 May - 20 May Frontier Airlines direct
16 May - 19 May Frontier Airlines direct
11 May - 17 May Frontier Airlines direct
30 May - 30 May Frontier Airlines direct
15 May - 18 May Frontier Airlines direct
17 May - 24 May Frontier Airlines direct
14 May - 17 May Frontier Airlines direct
31 May - 01 Jun Frontier Airlines direct
31 May - 07 Jun Frontier Airlines direct
15 May - 08 Jun Frontier Airlines direct
19 May - 02 Jun Frontier Airlines direct
19 May - 07 Jun Frontier Airlines direct
25 May - 30 Jun Frontier Airlines direct

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