Which airline is most reliable for DEN (Denver) to LAS (Las Vegas)?

The most reliable airline on the DEN to LAS route is Southwest Airlines, with an on-time arrival rate of 82%.

How often are flights delayed from DEN to LAS?

About 20% of flights from DEN to LAS experience delays. 80% arrive on time.

What's the average delay on DEN to LAS flights?

When flights from DEN to LAS are delayed, the average delay is approximately 41 minutes.

DEN → LAS

DEN (Denver) to LAS (Las Vegas)

DEN (Denver) to LAS (Las Vegas) flights arrive on time 80% of the time. The most reliable airline on this route is Southwest Airlines at 82%. The average delay is 41 minutes. Delays on this route are most often caused by weather.

Source: Bureau of Transportation Statistics. Updated March 2026.

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DEN → LAS on-time performance by month

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This route is on time most of the time. About 80% of flights arrive on schedule.

Delays on this route are most often caused by weather.

Airlines are roughly equal on this route — Southwest Airlines leads slightly at 82% vs United Airlines at 78%.

Airline Comparison

Southwest Airlines leads at 82% on time; United Airlines trails at 78%.

DEN Airport LAS Airport

Check the return: LAS → DEN

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Data last updated March 2026. Source: Bureau of Transportation Statistics.