PHL to SDF flight delays & on-time performance
Nonstop flights from Philadelphia International Airport to Louisville Muhammad Ali International Airport · 577 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PHL or SDF right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Philadelphia (PHL) to Louisville (SDF) arrived on time 81% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 2.8% were cancelled, and 8% arrived an hour or more late.
- Republic Airways was the most punctual airline here (84% on time); PSA Airlines was the least (78%).
- Departures scheduled around 8am did best (94% on time); around 1pm did worst (62%).
- Saturday was the most reliable day to fly (89% on time) and Thursday the least (75%).
- The largest source of delay minutes was late-arriving aircraft (60%).
Which airline is most on time from PHL to SDF?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 84% | 3.2% | 14 min | 7.8% | 347 |
| PSA AirlinesRegional airline operating American Eagle flights. | 78% | 2.4% | 16 min | 8.1% | 254 |
| American Airlines | 71% | 0.0% | 21 min | 14.3% | 7 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am94%33 flights
- 9am84%25 flights
- 10am89%45 flights
- 12pm81%54 flights
- 1pm62%26 flights
- 3pm71%111 flights
- 4pm90%11 flights
- 6pm85%111 flights
- 7pm81%75 flights
- 8pm85%114 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday86%2.2% cancelled
- Tuesday81%4.9% cancelled
- Wednesday86%3.7% cancelled
- Thursday75%1.1% cancelled
- Friday80%2.1% cancelled
- Saturday89%2.7% cancelled
- Sunday76%3.2% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft60%
- Airline (crew, maintenance, cleaning, fueling)21%
- Air traffic control & airport congestion15%
- Extreme weather4%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather82%
- Air traffic control & airport congestion12%
- Airline (crew, maintenance, cleaning, fueling)6%
- Security0%
PHL to SDF: common questions
- How often are PHL to SDF flights on time?
- 81% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Philadelphia to Louisville cancelled?
- 2.8% of scheduled flights were cancelled (17 of 608).
- How long are typical delays?
- Across all flights the average arrival delay was 15 min (early arrivals count as zero). Flights that were late arrived 76 min behind schedule on average, and 8.0% of flights were an hour or more late.
- How long is taxi time at PHL?
- Flights on this route spent 26 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SDF to PHL — 85% on time
More flights from Philadelphia
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: PHL → SDF, nonstop flights by US airlines that report to the DOT. How we calculate this.