Airports › Louisville (SDF) › May 2026
Airport month · May 2026
Louisville Muhammad Ali International in May 2026
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 May 2026, reporting carriers scheduled 2,304 domestic departures from Louisville Muhammad Ali International (SDF). 82.4% left less than 15 minutes late and 82.5% reached their destination on time; 0.9% were cancelled.
Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so SDF departures were 5.3 points above the national departure figure.
A year earlier, in May 2025, the airport had 2,125 departures with 78.0% leaving on time: a change of +4.4 points, with flights up 8%.
Flights arriving at SDF that month were on time 78.1% of the time (2,297 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 41%, late-arriving aircraft 36% and national aviation system 20%.
- On time 82.5%
- Arrived 15+ minutes late 16.2%
- Cancelled 0.9%
- Diverted 0.5%
May 2026 against a year earlier, the airport's year and the nation
| Measure | May 2026 | May 2025 | SDF, 12 months to Jul 2026 | All reported flights, May 2026 |
|---|---|---|---|---|
| Departed on time | 82.4% | 78.0% | 80.0% | 77.1% |
| Arrived on time | 82.5% | 77.9% | 79.7% | 77.6% |
| Cancelled | 0.9% | 1.2% | 2.2% | 0.9% |
| Average departure delay (late minutes only) | 13.5 min | 16.7 min | 15.9 min | 16.0 min |
| Scheduled departures a day | 77 | 71 | 63 | 20,391 |
| Scheduled departures | 2,304 | 2,125 | 23,144 | 611,735 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| YX Republic Airline | 599 | 26% | 89.3% | -6.8 min | 1.3% |
| WN Southwest Airlines | 484 | 21% | 82.4% | 0.6 min | 0.0% |
| OO SkyWest Airlines | 292 | 13% | 76.0% | 14.2 min | 1.0% |
| DL Delta Air Lines | 268 | 12% | 86.9% | -7.7 min | 1.5% |
| AA American Airlines | 252 | 11% | 77.4% | 6.9 min | 1.6% |
| OH PSA Airlines | 172 | 7% | 80.2% | 11.3 min | 0.6% |
| MQ Envoy Air | 97 | 4% | 80.4% | 4.6 min | 0.0% |
| UA United Airlines | 74 | 3% | 78.4% | -0.7 min | 0.0% |
| G4 Allegiant Air | 66 | 3% | 63.6% | 41.0 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| SDF–ORD | Louisville to Chicago | 312 | 81.1% | 1.7 min | 2.2% |
| SDF–ATL | Louisville to Atlanta | 263 | 88.6% | -8.6 min | 1.5% |
| SDF–DFW | Louisville to Dallas/Fort Worth | 183 | 76.0% | 5.9 min | 2.7% |
| SDF–CLT | Louisville to Charlotte | 165 | 81.8% | 5.0 min | 0.0% |
| SDF–DTW | Louisville to Detroit | 118 | 84.7% | 7.6 min | 0.0% |
| SDF–MSP | Louisville to Minneapolis | 118 | 77.1% | 16.4 min | 0.0% |
| SDF–LGA | Louisville to New York | 116 | 84.5% | -3.9 min | 1.7% |
| SDF–DEN | Louisville to Denver | 95 | 84.2% | -3.4 min | 0.0% |
| SDF–EWR | Louisville to Newark | 91 | 94.5% | -12.3 min | 2.2% |
| SDF–DCA | Louisville to Washington | 90 | 82.2% | 15.0 min | 0.0% |
| SDF–MDW | Louisville to Chicago | 85 | 82.4% | 1.0 min | 0.0% |
| SDF–BWI | Louisville to Baltimore | 80 | 90.0% | -2.2 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left SDF on time in May 2026?
82.4% of 2,304 scheduled domestic departures left less than 15 minutes late, and 82.5% reached their destination on time. The national figures that month were 77.1% and 77.6%.
How does that compare with a year earlier?
In May 2025, 78.0% of 2,125 departures left on time and 1.2% were cancelled, against 82.4% and 0.9% in May 2026.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2026; 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.