Airports › Louisville (SDF) › April 2025
Airport month · April 2025
Louisville Muhammad Ali International in April 2025
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 April 2025, reporting carriers scheduled 1,948 domestic departures from Louisville Muhammad Ali International (SDF). 81.6% left less than 15 minutes late and 80.6% reached their destination on time; 1.4% were cancelled.
Nationally that month, 80.6% of flights departed on time and 79.5% arrived on time, so SDF departures were 1.0 points above the national departure figure.
A year earlier, in April 2024, the airport had 2,048 departures with 85.1% leaving on time: a change of −3.5 points, with flights down 5%.
Flights arriving at SDF that month were on time 78.1% of the time (1,949 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 42%, air carrier 30% and national aviation system 21%.
- On time 80.6%
- Arrived 15+ minutes late 17.7%
- Cancelled 1.4%
- Diverted 0.3%
April 2025 against a year earlier, the airport's year and the nation
| Measure | Apr 2025 | Apr 2024 | SDF, 12 months to Jul 2026 | All reported flights, Apr 2025 |
|---|---|---|---|---|
| Departed on time | 81.6% | 85.1% | 80.0% | 80.6% |
| Arrived on time | 80.6% | 83.4% | 79.7% | 79.5% |
| Cancelled | 1.4% | 0.5% | 2.2% | 0.8% |
| Average departure delay (late minutes only) | 14.0 min | 10.4 min | 15.9 min | 14.1 min |
| Scheduled departures a day | 65 | 68 | 63 | 19,465 |
| Scheduled departures | 1,948 | 2,048 | 23,144 | 583,950 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| YX Republic Airline | 528 | 27% | 85.2% | -1.0 min | 1.3% |
| WN Southwest Airlines | 417 | 21% | 82.3% | 3.2 min | 0.7% |
| DL Delta Air Lines | 214 | 11% | 87.4% | -0.6 min | 1.4% |
| AA American Airlines | 186 | 10% | 69.9% | 23.0 min | 3.8% |
| OO SkyWest Airlines | 152 | 8% | 84.9% | -3.0 min | 1.3% |
| MQ Envoy Air | 137 | 7% | 71.5% | 7.7 min | 2.2% |
| OH PSA Airlines | 125 | 6% | 75.2% | 25.7 min | 1.6% |
| NK Spirit Airlines | 79 | 4% | 86.1% | -0.3 min | 0.0% |
| UA United Airlines | 60 | 3% | 73.3% | 17.7 min | 0.0% |
| G4 Allegiant Air | 50 | 3% | 56.0% | 21.8 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| SDF–ORD | Louisville to Chicago | 224 | 83.0% | 0.2 min | 0.9% |
| SDF–ATL | Louisville to Atlanta | 221 | 86.9% | 0.0 min | 1.4% |
| SDF–DFW | Louisville to Dallas/Fort Worth | 177 | 65.5% | 21.4 min | 4.0% |
| SDF–CLT | Louisville to Charlotte | 138 | 71.7% | 32.8 min | 1.4% |
| SDF–LGA | Louisville to New York | 138 | 87.7% | -4.5 min | 0.7% |
| SDF–DTW | Louisville to Detroit | 103 | 91.3% | -4.9 min | 0.0% |
| SDF–DEN | Louisville to Denver | 90 | 72.2% | 17.5 min | 0.0% |
| SDF–MCO | Louisville to Orlando | 89 | 85.4% | 3.6 min | 0.0% |
| SDF–MDW | Louisville to Chicago | 86 | 84.9% | -1.2 min | 1.2% |
| SDF–DCA | Louisville to Washington | 78 | 73.1% | 8.1 min | 1.3% |
| SDF–BWI | Louisville to Baltimore | 72 | 86.1% | -1.0 min | 0.0% |
| SDF–MSP | Louisville to Minneapolis | 72 | 87.5% | -4.0 min | 2.8% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left SDF on time in April 2025?
81.6% of 1,948 scheduled domestic departures left less than 15 minutes late, and 80.6% reached their destination on time. The national figures that month were 80.6% and 79.5%.
How does that compare with a year earlier?
In April 2024, 85.1% of 2,048 departures left on time and 0.5% were cancelled, against 81.6% and 1.4% in April 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for April 2025; 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.