Flight OddsDTW → STL Southwest Airlines
Southwest Airlines · Detroit, MI to St. Louis, MO · 593 flights, 2025-07-01 to 2026-06-30 · aggregated across 31 flight numbers
On-time arrival
77%
Median delay
-6 min
90th percentile
+39 min
Cancellation rate
1%
How on-time is Southwest Airlines from DTW to STL?
Across every Southwest Airlines flight number on DTW → STL (593 flights, 2025-07-01 to 2026-06-30), 77% arrived within 15 minutes of schedule. Median arrival delay -6 min; the worst 10% ran +39 min or later. 1% were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 453 | 77% |
| 16-30 min | 53 | 9% |
| 31-60 min | 47 | 8% |
| 61-120 min | 25 | 4% |
| 2+ hrs | 12 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 57 | 79% | +4 min |
| 2025-08 | 48 | 88% | +0 min |
| 2025-09 | 47 | 94% | +1 min |
| 2025-10 | 56 | 73% | +7 min |
| 2025-11 | 46 | 80% | -2 min |
| 2025-12 | 46 | 59% | +19 min |
| 2026-01 | 33 | 76% | -4 min |
| 2026-02 | 28 | 75% | +5 min |
| 2026-03 | 50 | 78% | +7 min |
| 2026-04 | 58 | 81% | -4 min |
| 2026-05 | 61 | 69% | +10 min |
| 2026-06 | 60 | 72% | +10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 91 | 76% |
| Tue | 82 | 84% |
| Wed | 78 | 83% |
| Thu | 90 | 74% |
| Fri | 93 | 69% |
| Sat | 68 | 85% |
| Sun | 88 | 69% |
WN flight numbers on DTW → STL
Related
Based on US DOT Bureau of Transportation Statistics on-time data. Loading the full breakdown…