Cheapest return flights from Ontario to Las Vegas in December from $97

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

Return flights

04 Dec - 04 Dec Southwest Airlines direct
03 Dec - 04 Dec Southwest Airlines direct
08 Dec - 11 Dec Southwest Airlines direct
06 Dec - 09 Dec Southwest Airlines direct
09 Dec - 13 Dec Southwest Airlines direct
02 Dec - 13 Jan Southwest Airlines direct
16 Dec - 18 Dec Frontier Airlines direct
04 Dec - 07 Dec Frontier Airlines direct
07 Dec - 09 Dec Frontier Airlines direct
13 Dec - 14 Dec Frontier Airlines direct
12 Dec - 13 Dec Frontier Airlines direct
25 Dec - 05 Jan Southwest Airlines
30 Dec - 06 Jan Southwest Airlines
27 Dec - 03 Jan Frontier Airlines direct
31 Dec - 02 Jan Frontier Airlines direct
25 Dec - 01 Jan Frontier Airlines direct
27 Dec - 09 Jan Southwest Airlines
29 Dec - 01 Jan Southwest Airlines
27 Dec - 01 Jan Southwest Airlines
25 Dec - 03 Jan Southwest Airlines

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

Skyscanner

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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