Cheapest return flights from Ontario to Las Vegas in January from $62

AirHint found the following cheapest return flights from Ontario (ONT) to Las Vegas (LAS) in January 2026 (see full year).

Return flights

29 Jan - 31 Jan Frontier Airlines direct
20 Jan - 27 Jan Frontier Airlines direct
21 Jan - 22 Jan Frontier Airlines direct
12 Jan - 14 Jan Frontier Airlines direct
18 Jan - 21 Jan Frontier Airlines direct
24 Jan - 26 Jan Frontier Airlines direct
20 Jan - 22 Jan Frontier Airlines direct
31 Jan - 06 Feb Frontier Airlines direct
11 Jan - 13 Jan Frontier Airlines direct
11 Jan - 14 Jan Frontier Airlines direct
10 Jan - 12 Jan Frontier Airlines direct
30 Jan - 02 Feb Frontier Airlines direct
28 Jan - 01 Feb Frontier Airlines direct
25 Jan - 01 Feb Southwest Airlines

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

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