Cheapest return flights from Ontario to Las Vegas in October from $129

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 October 2025 (see full year).

Return flights

15 Oct - 15 Oct Frontier Airlines direct
06 Oct - 08 Oct Frontier Airlines direct
30 Oct - 30 Oct Frontier Airlines direct
24 Oct - 31 Oct Frontier Airlines direct
03 Oct - 06 Oct Frontier Airlines direct
09 Oct - 13 Oct Frontier Airlines direct
10 Oct - 12 Oct Frontier Airlines direct
21 Oct - 21 Oct Southwest Airlines direct
01 Oct - 22 Oct Southwest Airlines direct
22 Oct - 22 Oct Southwest Airlines direct

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

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.

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