Route
PHL → SDF
Philadelphia International Airport Louisville Muhammad Ali International Airport
577 miles
Return route SDF → PHL →
How punctual is this route?
- On-time arrivals
- 80.9%
- Less than 15 minutes late
- Cancelled
- 3.2%
- Of scheduled flights
- Average delay when late
- 84 min
- Flights arriving 15+ minutes late
- Flights tracked
- 634
- Scheduled flights in the period
What caused the delays
- Late-arriving aircraft 57%
- Air traffic control & airport 20%
- Airline (crew, maintenance, cleaning) 15%
- Extreme weather 8%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 89.1% | 66 |
| October 2025 | 79.1% | 86 |
| November 2025 | 61.5% | 13 |
| December 2025 | 70.6% | 17 |
| January 2026 | 76.0% | 26 |
| February 2026 | 88.1% | 45 |
| March 2026 | 85.0% | 62 |
| April 2026 | 89.8% | 60 |
| May 2026 | 88.7% | 72 |
| June 2026 | 83.3% | 63 |
| July 2026 | 66.7% | 62 |
| August 2026 | 66.7% | 62 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Republic Airways | 374 | 83.2% | 4.0% | 95 min |
| OH | 253 | 77.6% | 2.0% | 72 min |
| American Airlines | 7 | 71.4% | 0.0% | 75 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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