Which departure time was most reliable for GRR to DTW?
Among qualifying GRR-to-DTW departure window results, Early morning had the highest on-time rate: 82.1% of 430 flights. Evening was lowest at 72.1% across 373 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 430 | 82.1% | 11.9% | 1.4% |
| Late morning | 236 | 78.0% | 16.1% | 1.3% |
| Afternoon | 549 | 77.2% | 17.3% | 0.4% |
| Evening | 373 | 72.1% | 23.1% | 1.1% |
Which weekday was most reliable for GRR to DTW?
Among qualifying GRR-to-DTW weekday results, Saturday had the highest on-time rate: 82.8% of 203 flights. Sunday was lowest at 74.2% across 229 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 233 | 75.5% | 17.6% | 1.7% |
| Tuesday | 234 | 74.8% | 20.5% | 0.4% |
| Wednesday | 230 | 77.8% | 17.0% | 0.9% |
| Thursday | 231 | 81.0% | 14.7% | 0.0% |
| Friday | 228 | 76.8% | 16.7% | 1.8% |
| Saturday | 203 | 82.8% | 12.3% | 1.0% |
| Sunday | 229 | 74.2% | 19.7% | 0.9% |
Which airline was most reliable for GRR to DTW?
Among qualifying GRR-to-DTW airline results, Republic Airways had the highest on-time rate: 90.8% of 65 flights. SkyWest Airlines was lowest at 76.9% across 1,506 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| SkyWest Airlines | 1,506 | 76.9% | 17.5% | 1.0% |
| Republic Airways | 65 | 90.8% | 6.2% | 0.0% |
| Delta Air Lines | 17 | 76.5% | 11.8% | 0.0% |
Which month was most reliable for GRR to DTW?
Among qualifying GRR-to-DTW month results, September 2025 had the highest on-time rate: 92.1% of 89 flights. December 2025 was lowest at 49.6% across 125 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 93 | 68.8% | 24.7% | 1.1% |
| August 2025 | 93 | 87.1% | 11.8% | 0.0% |
| September 2025 | 89 | 92.1% | 6.7% | 0.0% |
| October 2025 | 187 | 89.3% | 5.9% | 0.0% |
| November 2025 | 192 | 80.7% | 13.0% | 1.6% |
| December 2025 | 125 | 49.6% | 39.2% | 1.6% |
| January 2026 | 97 | 56.7% | 38.1% | 0.0% |
| February 2026 | 103 | 73.8% | 17.5% | 1.0% |
| March 2026 | 166 | 62.7% | 27.1% | 3.0% |
| April 2026 | 139 | 83.5% | 10.8% | 1.4% |
| May 2026 | 186 | 87.1% | 10.2% | 0.5% |
| June 2026 | 118 | 89.8% | 9.3% | 0.0% |
What drove GRR to DTW delay minutes?
Airline was the largest recorded GRR-to-DTW delay category, accounting for 67.4% of 36,313 BTS-attributed delay minutes during July 2025–June 2026.
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