Best Time to Fly GRR to MIA: On-Time Stats by Hour & Airline
Gerald R. Ford International → Miami International
Data through July 2026 · Last updated October 18, 2026
224 flights were scheduled from Grand Rapids (GRR) to Miami (MIA) in the last 12 months, and 80.0% of those that flew arrived on time, 2.4 points above the US average of 77.6%.
Among 2 airlines, American Airlines led with 83.1% on time and Envoy Air was last with 74.4%.
Over 24 months, Monday was the most reliable day (81% on time) and December the worst month (65%).
The cancellation rate was 1.3% (US average 1.8%).
GRR to MIA 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 | 83.1% | 114 min | 2.0% | 146 |
| Envoy Air | 74.4% | 87 min | 0.0% | 78 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GRR to MIA
On-time arrival % by scheduled departure hour (local time), 405 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 77.7% | 0.9% | 113 |
| 6am–7am | 79.9% | 1.0% | 288 |
| 1pm–2pm | Limited data | 4 | |
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 MIA
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) | Limited data | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 66.7% | -14.4 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | Limited data | 12 | ||
| All other days | 81.1% | — | 1.1% | 349 |
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).