Cheapest one-way flights from Ontario to Las Vegas in December from $39

AirHint found the following cheapest one-way flights from Ontario (ONT) to Las Vegas (LAS) in December 2025 (see full year).

One-Way flights

17 Dec Frontier Airlines direct
16 Dec Frontier Airlines direct
15 Dec Frontier Airlines direct
25 Dec Frontier Airlines direct
29 Dec Frontier Airlines direct
31 Dec Frontier Airlines direct
30 Dec Frontier Airlines direct
22 Dec Frontier Airlines direct
24 Dec Frontier Airlines direct
23 Dec Frontier Airlines direct

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

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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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