Best Time to Fly GRR to ATL: On-Time Stats by Hour & Airline
Gerald R. Ford International → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 86.5% of Grand Rapids (GRR) to Atlanta (ATL) flights arrived on time (1,425 scheduled flights). That is 8.9 points above the national average of 77.6%.
Among 2 airlines, Delta Air Lines led with 87.0% on time and Frontier Airlines was last with 70.7%.
Over 24 months, Tuesday was the most reliable day (89% on time) and January the worst month (73%).
The cancellation rate was 1.4% (US average 1.8%).
GRR to ATL 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 |
|---|---|---|---|---|
| Delta Air Lines | 87.0% | 79 min | 1.4% | 1,383 |
| Frontier Airlines | 70.7% | 111 min | 2.4% | 42 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GRR to ATL
On-time arrival % by scheduled departure hour (local time), 2,823 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 90.7% | 1.1% | 730 |
| 7am–8am | 86.2% | 1.5% | 66 |
| 8am–9am | 85.2% | 0.5% | 448 |
| 9am–10am | Limited data | 28 | |
| 10am–11am | Limited data | 4 | |
| 11am–12pm | Limited data | 2 | |
| 12pm–1pm | 88.5% | 1.0% | 519 |
| 1pm–2pm | 83.8% | 1.7% | 176 |
| 2pm–3pm | Limited data | 24 | |
| 3pm–4pm | 84.6% | 1.9% | 53 |
| 4pm–5pm | 86.7% | 0.0% | 180 |
| 5pm–6pm | 85.7% | 1.4% | 292 |
| 6pm–7pm | 81.6% | 0.6% | 175 |
| 7pm–8pm | 86.5% | 0.8% | 120 |
| 8pm–9pm | Limited data | 6 | |
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 ATL
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) | 68.5% | -18.9 pts | 0.0% | 54 |
| Christmas & New Year (Dec 20 - Jan 3) | 82.6% | -4.9 pts | 2.7% | 112 |
| Summer peak (Jun 15 - Aug 15) | 89.1% | +1.7 pts | 2.0% | 492 |
| All other days | 87.4% | — | 0.7% | 2,165 |
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).