Best Time to Fly GRR to DTW: On-Time Stats by Hour & Airline
Gerald R. Ford International → Detroit Metro Wayne County
Data through July 2026 · Last updated October 18, 2026
1,591 flights were scheduled from Grand Rapids (GRR) to Detroit (DTW) in the last 12 months, and 79.1% of those that flew arrived on time, 1.5 points above the US average of 77.6%.
Among 2 airlines, Republic Airways led with 92.2% on time and SkyWest Airlines was last with 78.3%.
Over 24 months, Saturday was the most reliable day (84% on time) and December the worst month (64%).
The cancellation rate was 0.9% (US average 1.8%).
GRR to DTW 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 |
|---|---|---|---|---|
| Republic Airways | 92.2% | 49 min | 0.0% | 90 |
| SkyWest Airlines | 78.3% | 106 min | 0.9% | 1,484 |
| Delta Air Lines | Limited data | 17 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GRR to DTW
On-time arrival % by scheduled departure hour (local time), 3,000 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 87.2% | 1.2% | 166 |
| 6am–7am | 88.0% | 1.0% | 310 |
| 8am–9am | 81.3% | 1.2% | 330 |
| 9am–10am | Limited data | 2 | |
| 10am–11am | 82.0% | 0.6% | 543 |
| 11am–12pm | Limited data | 4 | |
| 12pm–1pm | 90.9% | 0.0% | 44 |
| 1pm–2pm | 90.2% | 0.0% | 61 |
| 2pm–3pm | 76.7% | 0.0% | 429 |
| 3pm–4pm | 83.8% | 0.5% | 199 |
| 4pm–5pm | 72.7% | 1.4% | 145 |
| 5pm–6pm | 81.5% | 0.4% | 261 |
| 6pm–7pm | 69.8% | 1.0% | 204 |
| 7pm–8pm | 72.6% | 0.7% | 301 |
| 8pm–9pm | Limited data | 1 | |
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 DTW
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) | 59.1% | -22.3 pts | 2.7% | 73 |
| Christmas & New Year (Dec 20 - Jan 3) | 72.1% | -9.4 pts | 0.9% | 112 |
| Summer peak (Jun 15 - Aug 15) | 78.8% | -2.7 pts | 1.0% | 404 |
| All other days | 81.5% | — | 0.5% | 2,411 |
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).