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

Southwest Airlines Chicago, IL (MDW) to St. Louis, MO (STL) reliability

Among 1,705 scheduled Southwest Airlines flights from MDW to STL, 80.6% arrived on time, 11.5% arrived at least 30 minutes late, and 1.1% 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 SIGNALLower disruption
80.6%arrived on time
11.5%30+ min late
1.1%cancelled
1,705scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late11.5%
60+ minutes late5.6%
Cancelled1.1%
Average arrival+2.5 mincompleted flights

What did Southwest Airlines MDW to STL record?

Southwest Airlines completed 98.9% of its scheduled reportable MDW to STL flights in the observation window. 80.6% of all scheduled flights arrived less than 15 minutes late, while 5.6% arrived at least an hour late.

What were Southwest Airlines MDW to STL disruption rates?

For Southwest Airlines MDW-to-STL flights, 11.5% arrived at least 30 minutes late, 1.1% were cancelled, and 0.1% were diverted.

Compare all airlines on this route

What was the Southwest Airlines MDW to STL scheduled cohort?

The Southwest Airlines MDW-to-STL cohort contained 1,705 scheduled flights; 1,686 completed, 18 were cancelled, and 1 were diverted.

Not a prediction.

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