Best Time to Fly PHL to SDF: On-Time Stats by Hour & Airline
Philadelphia International → Louisville Muhammad Ali International
Data through July 2026 · Last updated October 18, 2026
608 flights were scheduled from Philadelphia (PHL) to Louisville (SDF) in the last 12 months, and 81.5% of those that flew arrived on time, 3.8 points above the US average of 77.6%.
Republic Airways was the most punctual of the 2 airlines on the route at 84.2%, while PSA Airlines trailed at 78.0%.
April has been the best month (90% on time) and Sunday the weakest day of the week (75%).
2.8% of flights were cancelled, versus 1.8% nationally.
PHL to SDF 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 |
|---|---|---|---|---|
| Republic Airways | 84.2% | 85 min | 3.2% | 347 |
| PSA Airlines | 78.0% | 67 min | 2.4% | 254 |
| American Airlines | Limited data | 7 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHL to SDF
On-time arrival % by scheduled departure hour (local time), 965 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 1 | |
| 8am–9am | 90.1% | 3.6% | 84 |
| 9am–10am | Limited data | 25 | |
| 10am–11am | 89.6% | 0.0% | 78 |
| 11am–12pm | Limited data | 1 | |
| 12pm–1pm | 80.8% | 3.7% | 54 |
| 1pm–2pm | 73.3% | 0.0% | 45 |
| 2pm–3pm | Limited data | 1 | |
| 3pm–4pm | 73.3% | 2.2% | 181 |
| 4pm–5pm | Limited data | 11 | |
| 6pm–7pm | 82.7% | 5.2% | 116 |
| 7pm–8pm | 74.2% | 4.4% | 252 |
| 8pm–9pm | 84.5% | 4.3% | 116 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PHL to SDF
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) | Limited data | 7 | ||
| Summer peak (Jun 15 - Aug 15) | 69.8% | -12.6 pts | 8.2% | 219 |
| All other days | 82.4% | — | 1.9% | 739 |
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).