Flight OddsHOU → STL Southwest Airlines
Southwest Airlines · Houston, TX to St. Louis, MO · 1,544 flights, 2025-07-01 to 2026-06-30 · aggregated across 89 flight numbers
On-time arrival
80%
Median delay
-5 min
90th percentile
+37 min
Cancellation rate
0%
How on-time is Southwest Airlines from HOU to STL?
Across every Southwest Airlines flight number on HOU → STL (1,544 flights, 2025-07-01 to 2026-06-30), 80% arrived within 15 minutes of schedule. Median arrival delay -5 min; the worst 10% ran +37 min or later. 0% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 1,231 | 80% |
| 16-30 min | 120 | 8% |
| 31-60 min | 98 | 6% |
| 61-120 min | 59 | 4% |
| 2+ hrs | 27 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 143 | 78% | +10 min |
| 2025-08 | 129 | 77% | +5 min |
| 2025-09 | 125 | 88% | -1 min |
| 2025-10 | 123 | 80% | +6 min |
| 2025-11 | 131 | 90% | -1 min |
| 2025-12 | 138 | 86% | +2 min |
| 2026-01 | 105 | 93% | -6 min |
| 2026-02 | 106 | 84% | +2 min |
| 2026-03 | 143 | 69% | +16 min |
| 2026-04 | 131 | 80% | +4 min |
| 2026-05 | 129 | 72% | +6 min |
| 2026-06 | 132 | 70% | +13 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 242 | 82% |
| Tue | 212 | 84% |
| Wed | 207 | 82% |
| Thu | 234 | 80% |
| Fri | 239 | 80% |
| Sat | 157 | 82% |
| Sun | 244 | 73% |
WN flight numbers on HOU → STL
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…