Atlanta (ATL) to Buffalo (BUF): On-Time Performance
Data through May 2026
Atlanta (ATL) to Buffalo (BUF) effectively runs on two schedules. In November 2024, 93% of arrivals were on time; in June 2025 that fell to 61% — a 32-point seasonal swing. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (83% vs 74%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 1.9%
- Flights/day
- 4.1
- last 12 months
- Duration
- 2h 1m
- scheduled
- Distance
- 712 mi
Best airline from ATL to BUF
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 80% | 13 min | 1.7% | 2,415 |
| Frontier Airlines | 70% | 22 min | 3.0% | 439 |
Monthly on-time trend
Best time to fly from ATL to BUF
Aim for departures around 8 a.m. (89% on-time); avoid 10 a.m. departures (64%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 15 min |
| Tuesday | 80% | 15 min |
| Wednesdaybest | 84% | 11 min |
| Thursday | 81% | 12 min |
| Friday | 78% | 15 min |
| Saturday | 76% | 13 min |
| Sunday | 71% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft31%
- Airline operations47%
- National airspace system14%
- Weather8%
Frequently asked questions
- How often are flights from ATL to BUF delayed?
- 22% of ATL–BUF flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 14 minutes.
- Which airline is most reliable from ATL to BUF?
- Delta Air Lines has the best on-time record on this route at 80%, based on 2,415 flights. 2 airlines flew ATL–BUF frequently enough to compare in this period.
- What is the best time of day to fly from ATL to BUF?
- Departures around 8 a.m. have the best record (89% on-time), while departures around 10 a.m. have the worst (64%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ATL to BUF?
- The scheduled ATL–BUF flight time averages 2h 1m over 712 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are ATL to BUF flights cancelled?
- 1.9% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from ATL to BUF?
- June 2025 was the roughest month in this dataset, with only 61% of arrivals on time. The best was November 2024 at 93%. If your dates are flexible, that 32-point gap is worth planning around.
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Based on 2,855 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.