Cheapest one-way flights from Ontario to Las Vegas in December from $115

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

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

One-Way flights

14 Dec Southwest Airlines direct
18 Dec Southwest Airlines direct
15 Dec Southwest Airlines direct
15 Dec Southwest Airlines
09 Dec Southwest Airlines direct
09 Dec Southwest Airlines
21 Dec Southwest Airlines direct
29 Dec Southwest Airlines direct
29 Dec Southwest Airlines
20 Dec Southwest Airlines direct

Also check the deals for return 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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