Which departure time was most reliable for DTW to STL?
Among qualifying DTW-to-STL departure window results, Early morning had the highest on-time rate: 84.1% of 648 flights. Night was lowest at 64.3% across 42 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 648 | 84.1% | 10.0% | 0.8% |
| Afternoon | 641 | 75.7% | 14.2% | 1.6% |
| Evening | 535 | 66.7% | 22.6% | 0.7% |
| Night | 42 | 64.3% | 28.6% | 0.0% |
Which weekday was most reliable for DTW to STL?
Among qualifying DTW-to-STL weekday results, Tuesday had the highest on-time rate: 81.5% of 275 flights. Sunday was lowest at 69.6% across 280 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 290 | 71.4% | 20.3% | 1.0% |
| Tuesday | 275 | 81.5% | 12.7% | 0.0% |
| Wednesday | 269 | 81.4% | 10.4% | 0.0% |
| Thursday | 288 | 78.1% | 12.8% | 0.3% |
| Friday | 285 | 70.9% | 20.0% | 1.4% |
| Saturday | 218 | 80.7% | 8.7% | 1.4% |
| Sunday | 280 | 69.6% | 20.4% | 2.9% |
Which airline was most reliable for DTW to STL?
Among qualifying DTW-to-STL airline results, Spirit Airlines had the highest on-time rate: 83.3% of 36 flights. SkyWest Airlines was lowest at 59.7% across 186 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Delta Air Lines | 1,088 | 79.0% | 13.9% | 1.2% |
| Southwest Airlines | 593 | 75.5% | 14.5% | 0.5% |
| SkyWest Airlines | 186 | 59.7% | 26.9% | 1.6% |
| Spirit Airlines | 36 | 83.3% | 13.9% | 0.0% |
| Republic Airways | 2 | 0.0% | 0.0% | 0.0% |
Which month was most reliable for DTW to STL?
Among qualifying DTW-to-STL month results, September 2025 had the highest on-time rate: 91.9% of 148 flights. December 2025 was lowest at 59.0% across 156 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 188 | 75.0% | 16.5% | 0.5% |
| August 2025 | 175 | 85.1% | 9.1% | 0.0% |
| September 2025 | 148 | 91.9% | 5.4% | 0.0% |
| October 2025 | 171 | 78.9% | 13.5% | 0.0% |
| November 2025 | 153 | 77.8% | 12.4% | 2.0% |
| December 2025 | 156 | 59.0% | 27.6% | 1.9% |
| January 2026 | 122 | 65.6% | 21.3% | 1.6% |
| February 2026 | 112 | 75.0% | 18.8% | 0.0% |
| March 2026 | 161 | 70.2% | 18.6% | 2.5% |
| April 2026 | 167 | 80.2% | 9.6% | 0.0% |
| May 2026 | 179 | 77.1% | 16.2% | 1.7% |
| June 2026 | 173 | 73.4% | 17.3% | 1.7% |
What drove DTW to STL delay minutes?
Airline was the largest recorded DTW-to-STL delay category, accounting for 50.8% of 27,964 BTS-attributed delay minutes during July 2025–June 2026.
Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.