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

Southwest Airlines St. Louis, MO (STL) to Baltimore, MD (BWI) reliability

Among 1,281 scheduled Southwest Airlines flights from STL to BWI, 79.5% arrived on time, 11.3% arrived at least 30 minutes late, and 1.2% 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
79.5%arrived on time
11.3%30+ min late
1.2%cancelled
1,281scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
30+ minutes late11.3%
60+ minutes late6.0%
Cancelled1.2%
Average arrival+4.6 mincompleted flights

What did Southwest Airlines STL to BWI record?

Southwest Airlines completed 98.5% of its scheduled reportable STL to BWI flights in the observation window. 79.5% of all scheduled flights arrived less than 15 minutes late, while 6.0% arrived at least an hour late.

What were Southwest Airlines STL to BWI disruption rates?

For Southwest Airlines STL-to-BWI flights, 11.3% arrived at least 30 minutes late, 1.2% were cancelled, and 0.2% were diverted.

Compare all airlines on this route

What was the Southwest Airlines STL to BWI scheduled cohort?

The Southwest Airlines STL-to-BWI cohort contained 1,281 scheduled flights; 1,262 completed, 16 were cancelled, and 3 were diverted.

Not a prediction.

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