Philadelphia (PHL) to Louisville (SDF): On-Time Performance
Data through July 2026
Delays are only half the story on PHL–SDF: 3.1% of its scheduled flights were outright cancelled, well above the US norm, so a backup plan matters more here than on most routes. When flights do go, 79% land on time, no worse than the national average of 78%.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 19 min
- completed flights
- Cancelled
- 3.1%
- Flights/day
- 1.7
- last 12 months
- Duration
- 2h 14m
- scheduled
- Distance
- 577 mi
Best airline from PHL to SDF
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 79% | 15 min | 3.5% | 606 |
| PSA Airlines | 78% | 24 min | 2.8% | 433 |
Monthly on-time trend
Best time to fly from PHL to SDF
Aim for departures around 8 a.m. (89% on-time); avoid 3 p.m. departures (73%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 26 min |
| Tuesdaybest | 83% | 13 min |
| Wednesday | 80% | 14 min |
| Thursday | 77% | 25 min |
| Friday | 76% | 25 min |
| Saturday | 80% | 15 min |
| Sunday | 76% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft57%
- Airline operations19%
- National airspace system20%
- Weather4%
Frequently asked questions
- How often are flights from PHL to SDF delayed?
- 21% of PHL–SDF 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 19 minutes.
- Which airline is most reliable from PHL to SDF?
- Republic Airways has the best on-time record on this route at 79%, based on 606 flights. 2 airlines flew PHL–SDF frequently enough to compare in this period.
- What is the best time of day to fly from PHL to SDF?
- Departures around 8 a.m. have the best record (89% on-time), while departures around 3 p.m. have the worst (73%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PHL to SDF?
- The scheduled PHL–SDF flight time averages 2h 14m over 577 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are PHL to SDF flights cancelled?
- 3.1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07 — several times the typical US rate, so consider earlier departures or backup options.
- What is the worst month to fly from PHL to SDF?
- June 2025 was the roughest month in this dataset, with only 55% of arrivals on time. The best was May 2026 at 89%. If your dates are flexible, that 34-point gap is worth planning around.
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Based on 1,052 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.