BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
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STL→DEN

Southwest Airlines St. Louis, MO (STL) to Denver, CO (DEN) reliability

Among 2,165 scheduled Southwest Airlines flights from STL to DEN, 73.0% arrived on time, 16.7% arrived at least 30 minutes late, and 0.2% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Marketing carrier: Southwest Airlines (WN) · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
73.0%arrived on time
16.7%30+ min late
0.2%cancelled
2,165scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late16.7%
60+ minutes late9.1%
Cancelled0.2%
Average arrival+11.6 mincompleted flights

What did Southwest Airlines STL to DEN record?

Southwest Airlines completed 99.6% of its scheduled reportable STL to DEN flights in the observation window. 73.0% of all scheduled flights arrived less than 15 minutes late, while 9.1% arrived at least an hour late.

What were Southwest Airlines STL to DEN disruption rates?

For Southwest Airlines STL-to-DEN flights, 16.7% arrived at least 30 minutes late, 0.2% were cancelled, and 0.2% were diverted.

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What was the Southwest Airlines STL to DEN scheduled cohort?

The Southwest Airlines STL-to-DEN cohort contained 2,165 scheduled flights; 2,156 completed, 5 were cancelled, and 4 were diverted.

Not a prediction.

This is a descriptive historical rate. Schedule changes, seasonal operations and current conditions may differ.