Which departure time was most reliable for DEN to GRR?
Among qualifying DEN-to-GRR departure window results, Late morning had the highest on-time rate: 84.7% of 490 flights. Evening was lowest at 61.2% across 487 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Late morning | 490 | 84.7% | 7.6% | 0.0% |
| Afternoon | 261 | 82.4% | 10.3% | 0.4% |
| Evening | 487 | 61.2% | 24.0% | 0.4% |
Which weekday was most reliable for DEN to GRR?
Among qualifying DEN-to-GRR weekday results, Tuesday had the highest on-time rate: 78.8% of 156 flights. Sunday was lowest at 69.7% across 188 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 186 | 75.3% | 16.1% | 0.0% |
| Tuesday | 156 | 78.8% | 12.2% | 0.6% |
| Wednesday | 165 | 73.9% | 18.2% | 0.0% |
| Thursday | 166 | 70.5% | 15.1% | 0.0% |
| Friday | 186 | 78.0% | 16.1% | 0.5% |
| Saturday | 192 | 78.1% | 8.9% | 0.0% |
| Sunday | 188 | 69.7% | 16.5% | 0.5% |
Which airline was most reliable for DEN to GRR?
Among qualifying DEN-to-GRR airline results, Frontier Airlines had the highest on-time rate: 87.1% of 147 flights. Southwest Airlines was lowest at 67.2% across 363 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| United Airlines | 728 | 76.2% | 14.3% | 0.3% |
| Southwest Airlines | 363 | 67.2% | 17.4% | 0.3% |
| Frontier Airlines | 147 | 87.1% | 10.2% | 0.0% |
| SkyWest Airlines | 1 | 100.0% | 0.0% | 0.0% |
Which month was most reliable for DEN to GRR?
Among qualifying DEN-to-GRR month results, April 2026 had the highest on-time rate: 85.3% of 95 flights. July 2025 was lowest at 63.1% across 122 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 122 | 63.1% | 23.8% | 1.6% |
| August 2025 | 121 | 69.4% | 19.0% | 0.0% |
| September 2025 | 115 | 78.3% | 13.9% | 0.0% |
| October 2025 | 111 | 77.5% | 12.6% | 0.0% |
| November 2025 | 102 | 78.4% | 8.8% | 0.0% |
| December 2025 | 102 | 63.7% | 20.6% | 0.0% |
| January 2026 | 97 | 76.3% | 14.4% | 0.0% |
| February 2026 | 84 | 81.0% | 9.5% | 1.2% |
| March 2026 | 70 | 80.0% | 12.9% | 0.0% |
| April 2026 | 95 | 85.3% | 6.3% | 0.0% |
| May 2026 | 106 | 82.1% | 11.3% | 0.0% |
| June 2026 | 114 | 70.2% | 18.4% | 0.0% |
What drove DEN to GRR delay minutes?
Late aircraft was the largest recorded DEN-to-GRR delay category, accounting for 50.2% of 15,839 BTS-attributed delay minutes during July 2025–June 2026.
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