Cheapest return flights from Ontario to Las Vegas in April from $113

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

Return flights

11 Apr - 12 Apr Frontier Airlines direct
10 Apr - 11 Apr Frontier Airlines direct
01 Apr - 06 Apr Frontier Airlines direct
05 Apr - 06 Apr Frontier Airlines direct
20 Apr - 30 Apr Southwest Airlines
07 Apr - 09 Apr Southwest Airlines
09 Apr - 16 Apr Southwest Airlines
08 Apr - 29 Apr Southwest Airlines
10 Apr - 13 Apr Southwest Airlines
23 Apr - 27 Apr Southwest Airlines
30 Apr - 07 May Southwest Airlines
27 Apr - 04 May Southwest Airlines
25 Apr - 05 May Southwest Airlines
27 Apr - 02 May Southwest Airlines
30 Apr - 05 May Southwest Airlines
29 Apr - 04 May Southwest Airlines
20 Apr - 04 May Southwest Airlines
25 Apr - 02 May Southwest Airlines
29 Apr - 01 May Southwest Airlines
30 Apr - 10 May Southwest Airlines

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

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