Southwest Airlines · Kansas City, MO to St. Louis, MO · 18 flights observed, 2025-11-22 to 2026-01-04 · 237 mi
WN3391 covers more than one route in the data window — the stats below are for MCI → STL, the one it has flown most recently. The others are linked under “Other routes”.
How often is WN3391 on time?
Across 18 flights on MCI → STL from 2025-11-22 to 2026-01-04, WN3391 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived +10 min or later. 6% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 15 | 88% |
| 16-30 min | 1 | 6% |
| 31-60 min | 1 | 6% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 4 | 75% | +0 min |
| 2025-12 | 10 | 90% | -8 min |
| 2026-01 | 3 | 100% | -18 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 2 | 50% |
| Tue | 3 | 100% |
| Wed | 1 | 100% |
| Thu | No data | — |
| Fri | 3 | 100% |
| Sat | 5 | 80% |
| Sun | 3 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…