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

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

Among 1,071 scheduled United Airlines flights from STL to DEN, 75.7% arrived on time, 15.7% arrived at least 30 minutes late, and 0.6% were cancelled during July 2025–June 2026.

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

HISTORICAL ROUTE SIGNALGenerally reliable
75.7%arrived on time
15.7%30+ min late
0.6%cancelled
1,071scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late15.7%
60+ minutes late9.7%
Cancelled0.6%
Average arrival+15.5 mincompleted flights

What did United Airlines STL to DEN record?

United Airlines completed 98.9% of its scheduled reportable STL to DEN flights in the observation window. 75.7% of all scheduled flights arrived less than 15 minutes late, while 9.7% arrived at least an hour late.

What were United Airlines STL to DEN disruption rates?

For United Airlines STL-to-DEN flights, 15.7% arrived at least 30 minutes late, 0.6% were cancelled, and 0.6% were diverted.

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What was the United Airlines STL to DEN scheduled cohort?

The United Airlines STL-to-DEN cohort contained 1,071 scheduled flights; 1,059 completed, 6 were cancelled, and 6 were diverted.

Not a prediction.

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