Airports › Louisville (SDF) › September 2023
Airport month · September 2023
Louisville Muhammad Ali International in September 2023
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In September 2023, reporting carriers scheduled 2,039 domestic departures from Louisville Muhammad Ali International (SDF). 85.1% left less than 15 minutes late and 83.2% reached their destination on time; 1.3% were cancelled.
Nationally that month, 80.5% of flights departed on time and 80.1% arrived on time, so SDF departures were 4.6 points above the national departure figure.
Flights arriving at SDF that month were on time 82.1% of the time (2,041 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 34%, air carrier 34% and national aviation system 25%.
- On time 83.2%
- Arrived 15+ minutes late 15.3%
- Cancelled 1.3%
- Diverted 0.2%
September 2023 against a year earlier, the airport's year and the nation
| Measure | Sep 2023 | Year earlier | SDF, 12 months to Jul 2026 | All reported flights, Sep 2023 |
|---|---|---|---|---|
| Departed on time | 85.1% | — | 80.0% | 80.5% |
| Arrived on time | 83.2% | — | 79.7% | 80.1% |
| Cancelled | 1.3% | — | 2.2% | 1.2% |
| Average departure delay (late minutes only) | 12.1 min | — | 15.9 min | 14.1 min |
| Scheduled departures a day | 68 | — | 63 | 18,978 |
| Scheduled departures | 2,039 | — | 23,144 | 569,338 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| YX Republic Airline | 468 | 23% | 81.2% | 1.0 min | 4.3% |
| WN Southwest Airlines | 428 | 21% | 84.8% | 1.0 min | 0.7% |
| AA American Airlines | 230 | 11% | 83.9% | 15.6 min | 0.0% |
| OO SkyWest Airlines | 195 | 10% | 85.1% | -3.6 min | 1.5% |
| DL Delta Air Lines | 188 | 9% | 94.7% | -8.6 min | 0.0% |
| UA United Airlines | 140 | 7% | 75.0% | 14.2 min | 0.0% |
| OH PSA Airlines | 121 | 6% | 85.1% | 8.7 min | 0.8% |
| NK Spirit Airlines | 116 | 6% | 69.0% | 14.3 min | 0.0% |
| MQ Envoy Air | 59 | 3% | 84.7% | -4.5 min | 0.0% |
| 9E Endeavor Air | 48 | 2% | 87.5% | -3.5 min | 0.0% |
| G4 Allegiant Air | 46 | 2% | 78.3% | 5.1 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| SDF–ATL | Louisville to Atlanta | 246 | 94.3% | -8.1 min | 0.0% |
| SDF–ORD | Louisville to Chicago | 161 | 80.1% | 7.8 min | 0.0% |
| SDF–CLT | Louisville to Charlotte | 159 | 86.2% | 16.2 min | 0.6% |
| SDF–DFW | Louisville to Dallas/Fort Worth | 157 | 82.8% | 4.2 min | 0.0% |
| SDF–LGA | Louisville to New York | 125 | 80.8% | 0.8 min | 4.8% |
| SDF–DCA | Louisville to Washington | 108 | 81.5% | 12.8 min | 1.9% |
| SDF–DEN | Louisville to Denver | 97 | 85.6% | 5.8 min | 1.0% |
| SDF–BOS | Louisville to Boston | 90 | 67.8% | 8.2 min | 8.9% |
| SDF–EWR | Louisville to Newark | 89 | 84.3% | 0.0 min | 4.5% |
| SDF–BWI | Louisville to Baltimore | 85 | 84.7% | 0.9 min | 2.4% |
| SDF–MDW | Louisville to Chicago | 85 | 90.6% | -1.0 min | 0.0% |
| SDF–DTW | Louisville to Detroit | 83 | 92.8% | -10.7 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left SDF on time in September 2023?
85.1% of 2,039 scheduled domestic departures left less than 15 minutes late, and 83.2% reached their destination on time. The national figures that month were 80.5% and 80.1%.
How does that compare with a year earlier?
September 2022 is outside the 36 months on file, or the airport had too few reported flights that month.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2023; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for SDF · methodology · corrections.