Best Time to Fly ATL to BHM: On-Time Stats by Hour & Airline
Hartsfield-Jackson Atlanta International → Birmingham-Shuttlesworth International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 83.7% of Atlanta (ATL) to Birmingham (BHM) flights arrived on time (3,334 scheduled flights). That is 6.1 points above the national average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
October has been the best month (91% on time) and Sunday the weakest day of the week (79%).
1.8% of flights were cancelled, versus 1.8% nationally.
ATL to BHM 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 | 83.7% | 65 min | 1.8% | 3,334 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ATL to BHM
On-time arrival % by scheduled departure hour (local time), 6,312 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 90.8% | 1.5% | 685 |
| 9am–10am | 88.8% | 0.4% | 259 |
| 10am–11am | 88.5% | 1.9% | 417 |
| 11am–12pm | 87.6% | 0.5% | 194 |
| 12pm–1pm | 91.9% | 0.2% | 409 |
| 1pm–2pm | 80.7% | 1.6% | 374 |
| 2pm–3pm | 86.6% | 0.0% | 343 |
| 3pm–4pm | 80.4% | 0.8% | 382 |
| 4pm–5pm | 84.0% | 1.1% | 443 |
| 5pm–6pm | 71.8% | 1.7% | 409 |
| 6pm–7pm | 77.8% | 1.5% | 527 |
| 7pm–8pm | 81.4% | 2.0% | 292 |
| 8pm–9pm | 77.3% | 0.9% | 453 |
| 9pm–10pm | 75.3% | 1.6% | 433 |
| 10pm–11pm | 85.6% | 1.8% | 382 |
| 11pm–12am | 76.3% | 3.2% | 310 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ATL to BHM
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) | 80.0% | -4.9 pts | 0.9% | 116 |
| Christmas & New Year (Dec 20 - Jan 3) | 77.8% | -7.1 pts | 1.6% | 244 |
| Summer peak (Jun 15 - Aug 15) | 75.5% | -9.4 pts | 1.5% | 1,163 |
| All other days | 84.9% | — | 1.3% | 4,789 |
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).