Route · PHL → SDF · 2020–2025 BTS data
Philadelphia to Louisville
The PHL–SDF corridor (Philadelphia, PA → Louisville, KY) runs ahead of the national average, served by 7 carriers across roughly 576 miles.
Data updated 2026-06-13
- 83.1%
- On-time
- +4.1 pts
- vs US avg
- 82 min
- Delay when late
- 2,337
- Flights
Cancelled
2.4%
Best Month
Sep 2023 93%
Worst Month
May 2025 69%
Distance
576 mi
Carriers
7
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Oct 2025 | 86 | 18 | 0 | 0 | OH,YX |
| Sep 2025 | 66 | 7 | 1 | 1 | OH,YX |
| Aug 2025 | 36 | 11 | 2 | 0 | YX,OH |
| Jul 2025 | 56 | 14 | 5 | 1 | OH,YX |
| Jun 2025 | 34 | 14 | 3 | 0 | OH,YX |
| May 2025 | 52 | 16 | 1 | 0 | AA,OH,YX |
| Oct 2024 | 56 | 9 | 0 | 0 | YX,OH |
| Sep 2024 | 92 | 11 | 0 | 0 | YX,OH |
| Aug 2024 | 62 | 15 | 6 | 0 | YX,OH |
| Jul 2024 | 87 | 24 | 1 | 1 | OH,YX |
| Jun 2024 | 58 | 13 | 1 | 0 | OH,YX |
| May 2024 | 56 | 13 | 1 | 0 | AA,OH,YX |
| Mar 2024 | 30 | 5 | 0 | 0 | OH |
| Oct 2023 | 35 | 3 | 0 | 0 | OH,YX |
| Sep 2023 | 58 | 4 | 3 | 0 | YX |
| Aug 2023 | 57 | 6 | 0 | 1 | OH,YX |
| Jul 2023 | 57 | 16 | 2 | 0 | YX,OH |
| Jun 2023 | 84 | 10 | 3 | 0 | OH,YX |
| May 2023 | 56 | 7 | 0 | 1 | AA,YX,OH |
| Apr 2023 | 30 | 6 | 0 | 0 | YX |
| Mar 2023 | 31 | 2 | 1 | 0 | YX |
| Jan 2023 | 40 | 3 | 0 | 0 | YX |
| Dec 2022 | 48 | 10 | 2 | 0 | YX,OH |
| Nov 2022 | 54 | 10 | 0 | 0 | OH,YX |
Cancellation Rate
2.4%
32 of 1,321 flights
Diversion Rate
0.4%
5 of 1,321 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
PHL - Philadelphia
Full on-time, delay-cause, and seasonal performance for Philadelphia, PA.
Origin airport →SDF - Louisville
Full on-time, delay-cause, and seasonal performance for Louisville, KY.
Destination airport →Compare the two airports
See PHL and SDF side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to PHL–SDF.
Routes with a similar on-time rate
What the Data Says About PHL to SDF
Bureau of Transportation Statistics records show Philadelphia to Louisville (PHL to SDF) running a 83.1% on-time rate over 2,337 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 82.2 minutes. The 576-mile corridor is served by 7 carriers, and over the last 24 months 2.4% of 1,321 flights were cancelled, 0.4% diverted.
The monthly split is wide on this route: Sep 2023 posted the strongest performance at 93% on-time, while May 2025 came in at just 69% - a 24-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.