Cheapest return flights from Ontario to Las Vegas in April from $182

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

Return flights

09 Apr - 13 Apr Frontier Airlines direct
24 Apr - 27 Apr Southwest Airlines direct
14 Apr - 29 Apr Southwest Airlines
23 Apr - 29 Apr Southwest Airlines
22 Apr - 29 Apr Southwest Airlines
11 Apr - 22 Apr Southwest Airlines
25 Apr - 30 Apr Southwest Airlines
13 Apr - 15 Apr Southwest Airlines
26 Apr - 29 Apr Southwest Airlines
04 Apr - 06 Apr Southwest Airlines direct

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

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