Flight OddsWN4438 STL → MDW
Southwest Airlines · St. Louis, MO to Chicago, IL · 55 flights observed, 2025-11-02 to 2026-01-05 · 251 mi
WN4438 covers more than one route in the data window — the stats below are for STL → MDW, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
83%
Median delay
-7 min
90th percentile
+26 min
Cancellation rate
4%
How often is WN4438 on time?
Across 55 flights on STL → MDW from 2025-11-02 to 2026-01-05, WN4438 arrived within 15 minutes of schedule 83% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +26 min or later. 4% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 44 | 83% |
| 16-30 min | 4 | 8% |
| 31-60 min | 3 | 6% |
| 61-120 min | 2 | 4% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 24 | 92% | -7 min |
| 2025-12 | 25 | 72% | +9 min |
| 2026-01 | 4 | 100% | -10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 10 | 80% |
| Tue | 9 | 100% |
| Wed | 7 | 86% |
| Thu | 5 | 80% |
| Fri | 9 | 89% |
| Sat | 4 | 75% |
| Sun | 9 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…