Best Time to Fly SDF to ATL: On-Time Stats by Hour & Airline
Louisville Muhammad Ali International → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
2,717 flights were scheduled from Louisville (SDF) to Atlanta (ATL) in the last 12 months, and 89.8% of those that flew arrived on time, 12.2 points above the US average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
Over 24 months, Thursday was the most reliable day (91% on time) and January the worst month (82%).
The cancellation rate was 1.6% (US average 1.8%).
SDF 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 | 89.8% | 89 min | 1.6% | 2,717 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SDF to ATL
On-time arrival % by scheduled departure hour (local time), 5,499 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 91.7% | 4.0% | 50 |
| 6am–7am | 92.9% | 1.3% | 681 |
| 7am–8am | 88.8% | 1.7% | 699 |
| 8am–9am | 91.6% | 0.5% | 671 |
| 9am–10am | 93.2% | 2.6% | 151 |
| 10am–11am | 89.4% | 2.0% | 504 |
| 11am–12pm | 93.8% | 0.8% | 246 |
| 12pm–1pm | 91.0% | 1.1% | 527 |
| 1pm–2pm | 84.9% | 1.1% | 188 |
| 2pm–3pm | 84.3% | 1.2% | 161 |
| 3pm–4pm | 87.6% | 0.4% | 487 |
| 4pm–5pm | 80.3% | 2.1% | 141 |
| 5pm–6pm | 82.8% | 1.3% | 455 |
| 6pm–7pm | 81.5% | 0.8% | 251 |
| 7pm–8pm | 81.2% | 2.4% | 165 |
| 8pm–9pm | 81.0% | 0.8% | 122 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SDF 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) | 84.8% | -4.4 pts | 0.0% | 105 |
| Christmas & New Year (Dec 20 - Jan 3) | 87.7% | -1.5 pts | 2.6% | 192 |
| Summer peak (Jun 15 - Aug 15) | 85.8% | -3.4 pts | 1.1% | 959 |
| All other days | 89.2% | — | 1.3% | 4,243 |
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).