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

03 Dec - 10 Dec Southwest Airlines direct
15 Dec - 18 Dec Southwest Airlines
05 Dec - 12 Dec Southwest Airlines direct
13 Dec - 14 Dec Southwest Airlines direct
01 Dec - 04 Dec Southwest Airlines direct
12 Dec - 14 Dec Southwest Airlines direct
31 Dec - 05 Jan Southwest Airlines direct
18 Dec - 03 Jan Southwest Airlines
23 Dec - 03 Jan Southwest Airlines
29 Dec - 02 Jan Southwest Airlines
26 Dec - 03 Jan Southwest Airlines
26 Dec - 27 Dec 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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