Flight OddsSTL → DSM Southwest Airlines
Southwest Airlines · St. Louis, MO to Des Moines, IA · 460 flights, 2025-07-01 to 2026-03-04 · aggregated across 22 flight numbers
On-time arrival
81%
Median delay
-7 min
90th percentile
+39 min
Cancellation rate
0%
How on-time is Southwest Airlines from STL to DSM?
Across every Southwest Airlines flight number on STL → DSM (460 flights, 2025-07-01 to 2026-03-04), 81% arrived within 15 minutes of schedule. Median arrival delay -7 min; the worst 10% ran +39 min or later. 0% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 369 | 81% |
| 16-30 min | 36 | 8% |
| 31-60 min | 29 | 6% |
| 61-120 min | 19 | 4% |
| 2+ hrs | 3 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 57 | 72% | +10 min |
| 2025-08 | 56 | 79% | +6 min |
| 2025-09 | 55 | 89% | -5 min |
| 2025-10 | 57 | 91% | -4 min |
| 2025-11 | 54 | 83% | 0 min |
| 2025-12 | 60 | 68% | +9 min |
| 2026-01 | 57 | 81% | +1 min |
| 2026-02 | 52 | 90% | -4 min |
| 2026-03 | 8 | 50% | +16 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 69 | 84% |
| Tue | 72 | 81% |
| Wed | 72 | 85% |
| Thu | 68 | 79% |
| Fri | 68 | 84% |
| Sat | 39 | 69% |
| Sun | 68 | 79% |
WN flight numbers on STL → DSM
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…