How often are STL to LAS flights on time?

Flights from St. Louis (STL) to Las Vegas (LAS) arrive on time 84% of the time across 11,961 flights of official data.

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

Southwest Airlines has the best on-time record on this route at 85% across 9,106 flights.

Route reliability

Flights from St. Louis to Las Vegas arrive on time 84% of the time across 11,961 flights. Here’s how each airline really performs.

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On-time rate

11,961 flights

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

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Do Morning Flights Really Have Fewer Delays?

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Are Some Airlines Really More Reliable Than Others?

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Score real STL–LAS flights on reliability, weather, and connection safety — not just price.