78% of flights from Rochester to Atlanta arrived on time over the past 12 months. That is about the typical U.S. route. The 6 a.m. departures ran on time 83% of the time; the noon ones 73%. 10% of flights arrived more than an hour late or not at all.
How late?
The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for ROC → ATL: when a flight was late, it was under 45 minutes late 52% of the time. About 1 in 13 flights landed an hour or more late, and 1 in 61 three hours or more; 2.3% were cancelled outright.
- On time or early78%
- 15–30 min late6.5%
- 30–60 min late5.8%
- 1–2 hours late4.7%
- 2–3 hours late1.2%
- 3+ hours late1.6%
- Diverted0.3%
- Cancelled2.3%
Share of all 1,043 scheduled flights, past 12 months, by arrival time against schedule.
By airline
| Airline | Flights | On time | Cancelled | Typical arrival | 1h+ late | Avg when late | Operated by |
|---|---|---|---|---|---|---|---|
| Delta Air Lines | 1,043 | 78% | 2.3% | −8 min | 7.6% | +76 min | Delta Air Lines |
Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.
Best time of day to fly
On-time rate by scheduled departure hour (local time at ROC). Delays build through the day as late planes knock on, so early flights usually do best.
Last flight of the day
On ROC → ATL, each airline's last flight of the day was cancelled 1.9% of the time, against 2.5% for its earlier flights, so here the last flight is actually the safer one. It arrived 3+ hours late 2.2% of the time (earlier flights: 1.3%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.
| Airline | Last departure | Last: cancelled | Last: 3h+ late | Earlier: cancelled | Next morning |
|---|---|---|---|---|---|
| Delta Air Lines | 6:15 p.m. | 1.9% | 2.2% | 2.5% | first flight 6:00 a.m. |
Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.
By month
Each calendar month pooled over 2023–2026. Best: September (92%). Worst: July (66%).
By day of week
| Day | Flights | On time | Cancelled |
|---|---|---|---|
| Monday | 158 | 77% | 5.1% |
| Tuesday | 153 | 80% | 0.7% |
| Wednesday | 151 | 79% | 0.7% |
| Thursday | 152 | 78% | 0.0% |
| Friday | 153 | 80% | 1.3% |
| Saturday | 124 | 80% | 3.2% |
| Sunday | 152 | 69% | 5.3% |
Why flights were late
Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.
Cancellations: airline 18 · weather 6
Month by month
Not enough months with data to draw a trend.
Flight numbers on this route
Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.
| Flight | Departs | Flights | On time | Cancelled | Typical arrival | Operated by |
|---|---|---|---|---|---|---|
| DL 1200 | 6:00 a.m. | 365 | 83% | 3.0% | −8 min | Delta Air Lines |
| DL 2511 | 12:26 p.m. | 361 | 75% | 1.9% | −5 min | Delta Air Lines |
| DL 2047 | 6:15 p.m. | 317 | 75% | 1.9% | −11 min | Delta Air Lines |
Worst days in the past year
| Date | Flights | On time | Cancelled |
|---|---|---|---|
| Jul 22, 2026 | 3 | 0% | 0 |
| Nov 10, 2025 | 3 | 0% | 1 |
| Jul 10, 2026 | 3 | 0% | 1 |
| Dec 7, 2025 | 3 | 0% | 0 |
| Nov 9, 2025 | 3 | 0% | 2 |
Nearby airport alternatives
Other ways to make the same trip, using airports within 60 miles of Rochester or Atlanta. None has been clearly more reliable than ROC → ATL.
| Route | Flights | On time | Cancelled |
|---|---|---|---|
| ROC → ATL (this route) | 1,043 | 78% | 2.3% |
| BUF → ATL Buffalo Niagara to Atlanta Hartsfield-Jackson | 1,533 | 78% | 2.0% |
Questions
How often are flights from ROC to ATL on time?
78% of 1,043 scheduled flights from Rochester, NY to Atlanta, GA arrived within 15 minutes of schedule between September 2025 and August 2026. 2.3% were cancelled.
What is the best time of day to fly ROC to ATL?
Flights scheduled to leave at 6 a.m. were the most reliable (83% on time). The noon departures were the least (73%).
What month has the most delays from ROC to ATL?
July (66% on time). The best month is September (92%), over 2023–2026.
Is the last flight of the day from ROC to ATL more likely to be cancelled?
No, the opposite. Each airline's last ROC–ATL flight of the day was cancelled 1.9% of the time over the past year, against 2.5% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.
Related
- ATL → ROC (return)
- Frederick Douglass Greater Rochester (ROC) delays by hour
- Flights into Atlanta Hartsfield-Jackson (ATL)
- Delta Air Lines on-time record
- Connecting off this flight? Check the risk
Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.