AUS → STL Southwest Airlines

Southwest Airlines · Austin, TX to St. Louis, MO · 977 flights, 2025-07-01 to 2026-06-30 · aggregated across 46 flight numbers

This route runs much more reliably at some times of day than others — 98% on-time departing 3–6am vs. 60% departing 3–6pm.
On-time arrival
78%
Median delay
-3 min
90th percentile
+34 min
Cancellation rate
0%

How on-time is Southwest Airlines from AUS to STL?

Across every Southwest Airlines flight number on AUS → STL (977 flights, 2025-07-01 to 2026-06-30), 78% arrived within 15 minutes of schedule. Median arrival delay -3 min; the worst 10% ran +34 min or later. 0% were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

ArrivalFlightsShare
Early / on-time75978%
16-30 min9510%
31-60 min647%
61-120 min343%
2+ hrs222%

Performance by month

MonthFlightsOn-timeAvg delay
2025-079372%+11 min
2025-087678%+11 min
2025-097379%0 min
2025-108383%+3 min
2025-118581%+6 min
2025-129182%+3 min
2026-016290%+1 min
2026-025983%-2 min
2026-038672%+13 min
2026-048985%+3 min
2026-059274%+8 min
2026-068560%+15 min

Performance by day of week

DayFlightsOn-time
Mon14874%
Tue14184%
Wed13884%
Thu14878%
Fri15077%
Sat8880%
Sun16170%

Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…