Best Time to Fly BUF to ATL: On-Time Stats by Hour & Airline
Buffalo Niagara International → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
1,520 flights were scheduled from Buffalo (BUF) to Atlanta (ATL) in the last 12 months, and 80.1% of those that flew arrived on time, 2.5 points above the US average of 77.6%.
Delta Air Lines was the most punctual of the 2 airlines on the route at 83.4%, while Frontier Airlines trailed at 64.4%.
September has been the best month (89% on time) and Sunday the weakest day of the week (75%).
2.2% of flights were cancelled, versus 1.8% nationally.
BUF 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 | 83.4% | 61 min | 2.0% | 1,249 |
| Frontier Airlines | 64.4% | 96 min | 3.0% | 270 |
| Southwest Airlines | Limited data | 1 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly BUF to ATL
On-time arrival % by scheduled departure hour (local time), 2,894 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 91.4% | 0.0% | 35 |
| 6am–7am | 86.5% | 1.7% | 695 |
| 9am–10am | Limited data | 10 | |
| 10am–11am | Limited data | 11 | |
| 11am–12pm | 70.5% | 0.0% | 45 |
| 12pm–1pm | 79.0% | 1.6% | 786 |
| 1pm–2pm | 75.0% | 5.0% | 101 |
| 2pm–3pm | 65.5% | 4.1% | 121 |
| 3pm–4pm | 83.1% | 0.0% | 83 |
| 4pm–5pm | 81.7% | 0.0% | 177 |
| 5pm–6pm | 74.0% | 2.0% | 198 |
| 6pm–7pm | 80.6% | 2.0% | 342 |
| 7pm–8pm | 74.2% | 1.1% | 268 |
| 8pm–9pm | Limited data | 4 | |
| 9pm–10pm | Limited data | 10 | |
| 10pm–11pm | Limited data | 8 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on BUF 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) | 68.6% | -13.0 pts | 0.0% | 51 |
| Christmas & New Year (Dec 20 - Jan 3) | 72.5% | -9.1 pts | 6.2% | 97 |
| Summer peak (Jun 15 - Aug 15) | 74.5% | -7.1 pts | 3.4% | 556 |
| All other days | 81.6% | — | 1.1% | 2,190 |
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).