Flight OddsSTL → DTW Southwest Airlines
Southwest Airlines · St. Louis, MO to Detroit, MI · 593 flights, 2025-07-01 to 2026-06-30 · aggregated across 25 flight numbers
On-time arrival
74%
Median delay
-1 min
90th percentile
+52 min
Cancellation rate
0%
How on-time is Southwest Airlines from STL to DTW?
Across every Southwest Airlines flight number on STL → DTW (593 flights, 2025-07-01 to 2026-06-30), 74% arrived within 15 minutes of schedule. Median arrival delay -1 min; the worst 10% ran +52 min or later. 0% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 440 | 74% |
| 16-30 min | 56 | 9% |
| 31-60 min | 41 | 7% |
| 61-120 min | 33 | 6% |
| 2+ hrs | 21 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 56 | 68% | +35 min |
| 2025-08 | 48 | 75% | +7 min |
| 2025-09 | 47 | 87% | +2 min |
| 2025-10 | 56 | 84% | +2 min |
| 2025-11 | 47 | 77% | +13 min |
| 2025-12 | 46 | 87% | +7 min |
| 2026-01 | 35 | 74% | +7 min |
| 2026-02 | 28 | 79% | 0 min |
| 2026-03 | 49 | 69% | +20 min |
| 2026-04 | 58 | 78% | +6 min |
| 2026-05 | 61 | 69% | +16 min |
| 2026-06 | 60 | 55% | +29 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 91 | 75% |
| Tue | 82 | 82% |
| Wed | 78 | 77% |
| Thu | 89 | 67% |
| Fri | 93 | 76% |
| Sat | 69 | 74% |
| Sun | 89 | 71% |
WN flight numbers on STL → DTW
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…