BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
AIRLINE × ROUTE REPORT
STLORD

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

A dedicated historical view of 525 United Airlines marketed flights on this direction during July 2025–June 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 this airline-route sample says

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.

Use the parent route report to compare this result with other marketing carriers and with time-of-day, weekday and monthly slices.

Compare all airlines on this route

Not a prediction.

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