Flight OddsWN1517 STL → MDW
Southwest Airlines · St. Louis, MO to Chicago, IL · 36 flights observed, 2025-11-02 to 2026-01-05 · 251 mi
WN1517 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
91%
Median delay
-9 min
90th percentile
+10 min
Cancellation rate
3%
How often is WN1517 on time?
Across 36 flights on STL → MDW from 2025-11-02 to 2026-01-05, WN1517 arrived within 15 minutes of schedule 91% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +10 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 32 | 91% |
| 16-30 min | 0 | 0% |
| 31-60 min | 3 | 9% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 16 | 94% | -5 min |
| 2025-12 | 15 | 87% | -4 min |
| 2026-01 | 4 | 100% | -11 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 80% |
| Tue | 3 | 100% |
| Wed | 1 | 100% |
| Thu | 3 | 100% |
| Fri | 8 | 100% |
| Sat | 5 | 80% |
| Sun | 10 | 90% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…