Best Time to Fly ROC to ATL: On-Time Stats by Hour & Airline
Frederick Douglass Grtr Rochester International → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 80.0% of Rochester (ROC) to Atlanta (ATL) flights arrived on time (1,041 scheduled flights). That is 2.4 points above the national average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
September has been the best month (93% on time) and Sunday the weakest day of the week (73%).
2.4% of flights were cancelled, versus 1.8% nationally.
ROC 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 | 80.0% | 74 min | 2.4% | 1,041 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ROC to ATL
On-time arrival % by scheduled departure hour (local time), 2,076 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 80.6% | 0.0% | 36 |
| 6am–7am | 87.5% | 3.2% | 694 |
| 11am–12pm | Limited data | 3 | |
| 12pm–1pm | 78.3% | 1.4% | 504 |
| 1pm–2pm | 76.1% | 0.9% | 114 |
| 2pm–3pm | 85.4% | 1.0% | 104 |
| 3pm–4pm | Limited data | 1 | |
| 5pm–6pm | Limited data | 3 | |
| 6pm–7pm | 74.0% | 0.8% | 595 |
| 7pm–8pm | Limited data | 22 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ROC 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) | 73.7% | -8.2 pts | 0.0% | 38 |
| Christmas & New Year (Dec 20 - Jan 3) | 62.3% | -19.5 pts | 6.1% | 82 |
| Summer peak (Jun 15 - Aug 15) | 76.6% | -5.2 pts | 4.4% | 365 |
| All other days | 81.8% | — | 1.1% | 1,591 |
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).