Cheapest return flights from Ontario to Las Vegas in December from $38

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

Return flights

09 Dec - 10 Dec Frontier Airlines direct
03 Dec - 03 Dec Frontier Airlines direct
09 Dec - 16 Dec Frontier Airlines direct
10 Dec - 16 Dec Frontier Airlines direct
10 Dec - 11 Dec Frontier Airlines direct
04 Dec - 11 Dec Frontier Airlines direct
24 Dec - 31 Dec Frontier Airlines direct
11 Dec - 16 Dec Frontier Airlines direct
16 Dec - 23 Dec Frontier Airlines direct
17 Dec - 15 Jan Frontier Airlines direct
13 Dec - 18 Dec Frontier Airlines direct
31 Dec - 05 Jan Frontier Airlines direct
25 Dec - 10 Jan Frontier Airlines direct
31 Dec - 02 Jan Frontier Airlines direct
24 Dec - 03 Jan Frontier Airlines direct
29 Dec - 02 Jan Frontier Airlines direct
30 Dec - 03 Jan Frontier Airlines direct
28 Dec - 04 Jan Southwest Airlines
26 Dec - 04 Jan Southwest Airlines

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

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