Best Time to Fly GRR to ORD: On-Time Stats by Hour & Airline
Gerald R. Ford International → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 68.9% of Grand Rapids (GRR) to Chicago (ORD) flights arrived on time (4,032 scheduled flights). That is 8.7 points below the national average of 77.6%.
American Airlines was the most punctual of the 5 airlines on the route at 74.4%, while United Airlines trailed at 64.0%.
May has been the best month (79% on time) and Friday the weakest day of the week (67%).
3.0% of flights were cancelled, versus 1.8% nationally.
GRR to ORD on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| American Airlines | 74.4% | 130 min | 3.4% | 531 |
| Republic Airways | 71.6% | 80 min | 3.6% | 672 |
| Envoy Air | 71.1% | 70 min | 3.5% | 934 |
| SkyWest Airlines | 67.5% | 109 min | 3.6% | 821 |
| United Airlines | 64.0% | 74 min | 1.3% | 1,072 |
| PSA Airlines | Limited data | 2 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GRR to ORD
On-time arrival % by scheduled departure hour (local time), 7,139 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 88.4% | 6.2% | 129 |
| 6am–7am | 85.0% | 1.6% | 805 |
| 7am–8am | 76.6% | 1.2% | 1,115 |
| 8am–9am | 77.0% | 4.7% | 64 |
| 9am–10am | 76.1% | 1.9% | 678 |
| 10am–11am | 79.3% | 1.8% | 221 |
| 11am–12pm | 80.7% | 1.2% | 404 |
| 12pm–1pm | 73.5% | 0.8% | 1,049 |
| 1pm–2pm | 69.7% | 0.8% | 133 |
| 2pm–3pm | 74.8% | 1.8% | 167 |
| 3pm–4pm | 66.5% | 4.5% | 419 |
| 4pm–5pm | 63.8% | 1.7% | 480 |
| 5pm–6pm | 60.0% | 3.0% | 299 |
| 6pm–7pm | 56.8% | 2.1% | 662 |
| 7pm–8pm | 50.5% | 3.9% | 408 |
| 8pm–9pm | 55.8% | 7.1% | 84 |
| 9pm–10pm | Limited data | 17 | |
| 10pm–11pm | Limited data | 5 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on GRR to ORD
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 51.6% | -21.6 pts | 12.1% | 141 |
| Christmas & New Year (Dec 20 - Jan 3) | 60.2% | -13.0 pts | 1.2% | 254 |
| Summer peak (Jun 15 - Aug 15) | 69.5% | -3.8 pts | 2.4% | 1,241 |
| All other days | 73.2% | — | 1.7% | 5,503 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).