Which departure time was most reliable for STL to DTW?
Among qualifying STL-to-DTW departure window results, Early morning had the highest on-time rate: 91.4% of 456 flights. Evening was lowest at 73.8% across 706 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 456 | 91.4% | 5.3% | 1.8% |
| Late morning | 512 | 81.4% | 12.5% | 0.8% |
| Afternoon | 231 | 79.7% | 13.4% | 0.9% |
| Evening | 706 | 73.8% | 17.4% | 1.1% |
Which weekday was most reliable for STL to DTW?
Among qualifying STL-to-DTW weekday results, Tuesday had the highest on-time rate: 86.5% of 274 flights. Monday was lowest at 73.5% across 291 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 291 | 73.5% | 17.2% | 2.4% |
| Tuesday | 274 | 86.5% | 9.1% | 0.4% |
| Wednesday | 269 | 86.2% | 9.7% | 0.0% |
| Thursday | 288 | 83.7% | 8.7% | 0.7% |
| Friday | 285 | 78.6% | 14.7% | 2.1% |
| Saturday | 218 | 81.2% | 13.8% | 0.5% |
| Sunday | 280 | 76.4% | 15.7% | 1.8% |
Which airline was most reliable for STL to DTW?
Among qualifying STL-to-DTW airline results, Delta Air Lines had the highest on-time rate: 86.6% of 1,088 flights. SkyWest Airlines was lowest at 71.0% across 186 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Delta Air Lines | 1,088 | 86.6% | 8.8% | 1.7% |
| Southwest Airlines | 593 | 73.4% | 16.4% | 0.3% |
| SkyWest Airlines | 186 | 71.0% | 22.6% | 1.1% |
| Spirit Airlines | 36 | 83.3% | 16.7% | 0.0% |
| Republic Airways | 2 | 0.0% | 50.0% | 0.0% |
Which month was most reliable for STL to DTW?
Among qualifying STL-to-DTW month results, September 2025 had the highest on-time rate: 93.9% of 148 flights. June 2026 was lowest at 69.4% across 173 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 188 | 75.0% | 19.7% | 1.1% |
| August 2025 | 175 | 85.7% | 8.0% | 0.0% |
| September 2025 | 148 | 93.9% | 3.4% | 0.0% |
| October 2025 | 171 | 86.5% | 8.8% | 0.6% |
| November 2025 | 153 | 85.6% | 9.2% | 1.3% |
| December 2025 | 156 | 75.6% | 15.4% | 3.2% |
| January 2026 | 122 | 75.4% | 18.0% | 0.0% |
| February 2026 | 112 | 79.5% | 13.4% | 0.0% |
| March 2026 | 161 | 75.8% | 16.8% | 3.1% |
| April 2026 | 167 | 86.2% | 6.6% | 0.0% |
| May 2026 | 179 | 81.0% | 13.4% | 1.7% |
| June 2026 | 173 | 69.4% | 19.7% | 2.3% |
What drove STL to DTW delay minutes?
Airline was the largest recorded STL-to-DTW delay category, accounting for 46.0% of 29,619 BTS-attributed delay minutes during July 2025–June 2026.
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