Buffalo (BUF) to Atlanta (ATL): On-Time Performance
Data through July 2026
When you fly BUF to ATL matters as much as anything else about the booking: the route swung from 96% on-time in September 2025 to just 63% in July 2026. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (86% vs 75%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 1.9%
- Flights/day
- 4.2
- last 12 months
- Duration
- 2h 15m
- scheduled
- Distance
- 712 mi
Best airline from BUF to ATL
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 81% | 13 min | 1.7% | 2,541 |
| Frontier Airlines | 68% | 27 min | 3.1% | 486 |
Monthly on-time trend
Best time to fly from BUF to ATL
Aim for departures around 5 a.m. (91% on-time); avoid 2 p.m. departures (66%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 19 min |
| Tuesday | 80% | 17 min |
| Wednesdaybest | 87% | 10 min |
| Thursday | 82% | 12 min |
| Friday | 78% | 16 min |
| Saturday | 76% | 16 min |
| Sunday | 74% | 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 aircraft48%
- Airline operations30%
- National airspace system17%
- Weather5%
Frequently asked questions
- How often are flights from BUF to ATL delayed?
- 21% of BUF–ATL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 15 minutes.
- Which airline is most reliable from BUF to ATL?
- Delta Air Lines has the best on-time record on this route at 81%, based on 2,541 flights. 2 airlines flew BUF–ATL frequently enough to compare in this period.
- What is the best time of day to fly from BUF to ATL?
- Departures around 5 a.m. have the best record (91% on-time), while departures around 2 p.m. have the worst (66%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BUF to ATL?
- The scheduled BUF–ATL flight time averages 2h 15m over 712 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are BUF to ATL flights cancelled?
- 1.9% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from BUF to ATL?
- July 2026 was the roughest month in this dataset, with only 63% of arrivals on time. The best was September 2025 at 96%. If your dates are flexible, that 33-point gap is worth planning around.
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Based on 3,028 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.