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

United Airlines St. Louis, MO (STL) to Chicago, IL (ORD) reliability

Among 525 scheduled United Airlines flights from STL to ORD, 67.4% arrived on time, 18.3% arrived at least 30 minutes late, and 1.5% 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 SIGNALVariable
67.4%arrived on time
18.3%30+ min late
1.5%cancelled
525scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late18.3%
60+ minutes late9.5%
Cancelled1.5%
Average arrival+23.0 mincompleted flights

What did United Airlines STL to ORD record?

United Airlines completed 98.3% of its scheduled reportable STL to ORD flights in the observation window. 67.4% of all scheduled flights arrived less than 15 minutes late, while 9.5% arrived at least an hour late.

What were United Airlines STL to ORD disruption rates?

For United Airlines STL-to-ORD flights, 18.3% arrived at least 30 minutes late, 1.5% were cancelled, and 0.2% were diverted.

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What was the United Airlines STL to ORD scheduled cohort?

The United Airlines STL-to-ORD cohort contained 525 scheduled flights; 516 completed, 8 were cancelled, and 1 were diverted.

Not a prediction.

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