Cheapest return flights from Ontario to Las Vegas in May from $28

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

AirHint found the following cheapest return flights from Ontario (ONT) to Las Vegas (LAS) in May 2025 (see full year).

Return flights

01 May - 06 May Frontier Airlines direct
01 May - 15 May Frontier Airlines direct
04 May - 07 May Frontier Airlines direct
01 May - 03 May Frontier Airlines direct
10 May - 11 May Frontier Airlines direct
09 May - 11 May Frontier Airlines direct
04 May - 18 May Frontier Airlines direct
01 May - 01 May Frontier Airlines direct
07 May - 09 May Frontier Airlines direct
02 May - 05 May Frontier Airlines direct
29 May - 01 Jun Frontier Airlines direct
31 May - 01 Jun Frontier Airlines direct
31 May - 10 Jun Southwest Airlines
25 May - 28 Jun Southwest Airlines
27 May - 01 Jun Southwest Airlines

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

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.

Book a cheap hotel in Las Vegas

Cheap car rent in Las Vegas