Which departure time was most reliable for ORD to GRR?
Among qualifying ORD-to-GRR departure window results, Early morning had the highest on-time rate: 79.5% of 365 flights. Night was lowest at 56.6% across 686 flights.
| Departure window | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Early morning | 365 | 79.5% | 11.0% | 3.0% |
| Late morning | 800 | 75.5% | 16.1% | 1.0% |
| Afternoon | 1,261 | 70.0% | 19.8% | 2.9% |
| Evening | 922 | 61.6% | 23.9% | 3.1% |
| Night | 686 | 56.6% | 27.0% | 4.7% |
Which weekday was most reliable for ORD to GRR?
Among qualifying ORD-to-GRR weekday results, Tuesday had the highest on-time rate: 70.8% of 565 flights. Monday was lowest at 63.7% across 603 flights.
| Day | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Monday | 603 | 63.7% | 23.7% | 4.6% |
| Tuesday | 565 | 70.8% | 19.5% | 1.4% |
| Wednesday | 558 | 67.4% | 20.6% | 2.0% |
| Thursday | 590 | 70.2% | 17.6% | 3.4% |
| Friday | 591 | 66.8% | 20.8% | 2.5% |
| Saturday | 541 | 69.5% | 19.0% | 2.6% |
| Sunday | 586 | 66.2% | 21.5% | 3.4% |
Which airline was most reliable for ORD to GRR?
Among qualifying ORD-to-GRR airline results, Envoy Air had the highest on-time rate: 72.9% of 929 flights. American Airlines was lowest at 56.5% across 531 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| United Airlines | 1,073 | 66.1% | 22.1% | 1.2% |
| Envoy Air | 929 | 72.9% | 16.3% | 3.9% |
| SkyWest Airlines | 838 | 68.1% | 20.9% | 3.5% |
| Republic Airways | 661 | 72.0% | 16.8% | 3.0% |
| American Airlines | 531 | 56.5% | 27.9% | 3.4% |
| PSA Airlines | 2 | 0.0% | 100.0% | 0.0% |
Which month was most reliable for ORD to GRR?
Among qualifying ORD-to-GRR month results, September 2025 had the highest on-time rate: 79.9% of 309 flights. December 2025 was lowest at 53.5% across 318 flights.
| Month | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| July 2025 | 329 | 63.8% | 25.2% | 2.1% |
| August 2025 | 314 | 72.3% | 16.6% | 1.6% |
| September 2025 | 309 | 79.9% | 13.3% | 0.6% |
| October 2025 | 360 | 75.0% | 14.4% | 0.3% |
| November 2025 | 358 | 65.6% | 19.3% | 7.3% |
| December 2025 | 318 | 53.5% | 31.4% | 2.8% |
| January 2026 | 283 | 60.8% | 22.6% | 2.1% |
| February 2026 | 288 | 66.7% | 22.9% | 0.0% |
| March 2026 | 335 | 60.0% | 27.5% | 4.8% |
| April 2026 | 443 | 65.2% | 21.4% | 5.9% |
| May 2026 | 418 | 76.8% | 14.4% | 1.7% |
| June 2026 | 279 | 71.3% | 17.9% | 3.9% |
What drove ORD to GRR delay minutes?
Late aircraft was the largest recorded ORD-to-GRR delay category, accounting for 45.5% of 92,213 BTS-attributed delay minutes during July 2025–June 2026.
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