PHL to SDF flight delays
Philadelphia, PA (PHL) Louisville, KY (SDF) · 577 miles
602 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
82.1%
Arrived on time
Within 15 minutes of schedule
2.82%
Cancelled
Share of scheduled flights
72 min
When late, late by
Average across delayed arrivals
14 min
Delay per flight
Averaged over every flight flown
What the record says about this route
Cancellation, not delay, is the risk worth pricing here: 2.82% of scheduled flights never operated. A late flight still gets you there. A cancelled one leaves you rebooking, and on a route with few daily departures that can mean losing a day.
The shape of the lateness matters here. Flights on this route are not late often, but when they are late they are late by about 72 minutes — long enough to lose a connection or an evening. The on-time percentage looks reassuring and understates the consequence of being on the wrong flight.
The season swings this route hard. In April it ran 22.2 points more punctual than in August — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The route has been getting better. The later months in the record run 8.7 points more punctual than the earlier ones, which usually means a schedule that was too tight has been given more room.
Which airline should you fly on this route?
Over January 2025 – August 2026, Republic Airways arrived on time most often on PHL to SDF. PSA Airlines was late most often. Flights ran closest to schedule in April and worst in November.
Every airline on PHL to SDF
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Republic Airways | 346 | 82.53% | 3.47% | 80 min | C |
| PSA Airlines | 249 | 81.82% | 2.01% | 62 min | C |
| American Airlines | 7 | 71.43% | 0% | 68 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
SDF to PHL Louisville back to Philadelphia 86.63% on time BOther routes from Philadelphia
Common questions
Are flights from Philadelphia to Louisville usually delayed?
82.1% of flights on the PHL to SDF route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airline is most on time from Philadelphia to Louisville?
Republic Airways, at 82.53% on time across 346 flights. The least punctual on the route was PSA Airlines at 81.82%.
How often are PHL to SDF flights cancelled?
2.82% of scheduled flights did not operate — about 28 in every thousand. That is high enough that cancellation, not delay, is the risk worth planning around.
What is the best month to fly Philadelphia to Louisville?
April, when 89.8% of flights arrived on time. The worst was August at 67.6%.
When PHL to SDF flights are late, how late are they?
About 72 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on PHL to SDF during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →