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

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

Return flights

20 Jan - 23 Jan Frontier Airlines direct
31 Jan - 03 Feb Frontier Airlines direct
09 Jan - 09 Jan Frontier Airlines direct
16 Jan - 21 Jan Frontier Airlines direct
31 Jan - 07 Feb Frontier Airlines direct
22 Jan - 29 Jan Frontier Airlines direct
05 Jan - 08 Jan Frontier Airlines direct
24 Jan - 31 Jan Frontier Airlines direct
08 Jan - 15 Jan Frontier Airlines direct
29 Jan - 05 Feb Frontier Airlines direct
01 Jan - 08 Jan Frontier Airlines direct
09 Jan - 11 Jan Frontier Airlines direct
24 Jan - 25 Jan Frontier Airlines direct
30 Jan - 06 Feb Frontier Airlines direct
25 Jan - 01 Feb Frontier Airlines direct

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

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