Cheapest return flights from Las Vegas to Ontario in March from $53

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

Return flights

06 Mar - 08 Mar Frontier Airlines direct
04 Mar - 04 Mar Frontier Airlines direct
09 Mar - 11 Mar Frontier Airlines direct
05 Mar - 05 Mar Frontier Airlines direct
16 Mar - 30 Mar Frontier Airlines direct
23 Mar - 30 Mar Frontier Airlines direct
23 Mar - 24 Mar Frontier Airlines direct
09 Mar - 16 Mar Frontier Airlines direct
02 Mar - 06 Mar Frontier Airlines direct
05 Mar - 13 Mar Frontier Airlines direct
31 Mar - 02 Apr Frontier Airlines direct
31 Mar - 03 Apr Frontier Airlines direct
28 Mar - 06 Apr Frontier Airlines direct

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

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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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