How often are ONT to LAS flights on time?

Flights from Ontario (ONT) to Las Vegas (LAS) arrive on time 86% of the time across 13,618 flights of official data.

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

Southwest Airlines has the best on-time record on this route at 87% across 10,035 flights.

Route reliability

Flights from Ontario to Las Vegas arrive on time 86% of the time across 13,618 flights. Here’s how each airline really performs.

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On-time rate

13,618 flights

Airline	On-time	Flights
Southwest Airlines	87%	10,035
Frontier Airlines	82%	3,583

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

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