How often are LAS to ONT flights on time?

Flights from Las Vegas (LAS) to Ontario (ONT) arrive on time 80% of the time across 13,670 flights of official data.

Which airline is most reliable on the LAS to ONT route?

Frontier Airlines has the best on-time record on this route at 84% across 3,586 flights.

Route reliability

Flights from Las Vegas to Ontario arrive on time 80% of the time across 13,670 flights. Here’s how each airline really performs.

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On-time rate

13,670 flights

Airline	On-time	Flights
Frontier Airlines	84%	3,586
Southwest Airlines	78%	10,084

On-time = arrived within 15 minutes of schedule, per BTS TranStats. Compare the reverse leg ONT → LAS.

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