ORIGIN AIRPORT REPORT
SDF
Louisville, KY (SDF) departure reliability
Of 23,305 scheduled reportable flights departing SDF, 79.7% arrived on time, 12.3% arrived at least 30 minutes late, and 2.2% were cancelled during July 2025–June 2026.
Source: U.S. Bureau of Transportation Statistics · Origin-airport cohort · Updated September 16, 2026
HISTORICAL ROUTE SIGNALGenerally reliable
79.7%arrived on time
12.3%30+ min late
2.2%cancelled
23,305scheduled flights
MOST-FLOWN DIRECTIONS
ALL ROUTES →Which route from SDF had the largest sample?
SDF to ORD was SDF's largest published route sample, with 2,807 scheduled flights and a 76.7% on-time rate during July 2025–June 2026.
SDF→ORDLouisville, KY (SDF) to Chicago, IL (ORD)2,807 flights analyzedVariable76.7%on timeSDF→ATLLouisville, KY (SDF) to Atlanta, GA (ATL)2,707 flights analyzedGenerally reliable88.5%on timeSDF→DFWLouisville, KY (SDF) to Dallas/Fort Worth, TX (DFW)2,015 flights analyzedVariable71.9%on timeSDF→CLTLouisville, KY (SDF) to Charlotte, NC (CLT)1,754 flights analyzedGenerally reliable80.8%on timeSDF→DTWLouisville, KY (SDF) to Detroit, MI (DTW)1,190 flights analyzedLower disruption81.2%on timeSDF→DENLouisville, KY (SDF) to Denver, CO (DEN)1,103 flights analyzedLower disruption82.0%on timeSDF→LGALouisville, KY (SDF) to New York, NY (LGA)1,063 flights analyzedHigher disruption79.3%on timeSDF→DCALouisville, KY (SDF) to Washington, DC (DCA)1,029 flights analyzedHigher disruption75.0%on timeSDF→MDWLouisville, KY (SDF) to Chicago, IL (MDW)989 flights analyzedGenerally reliable82.3%on timeSDF→EWRLouisville, KY (SDF) to Newark, NJ (EWR)973 flights analyzedVariable82.6%on timeSDF→BWILouisville, KY (SDF) to Baltimore, MD (BWI)889 flights analyzedGenerally reliable83.7%on timeSDF→MCOLouisville, KY (SDF) to Orlando, FL (MCO)868 flights analyzedGenerally reliable78.8%on timeSDF→BOSLouisville, KY (SDF) to Boston, MA (BOS)707 flights analyzedGenerally reliable70.3%on timeSDF→PHLLouisville, KY (SDF) to Philadelphia, PA (PHL)602 flights analyzedGenerally reliable85.0%on timeSDF→MSPLouisville, KY (SDF) to Minneapolis, MN (MSP)593 flights analyzedLower disruption81.1%on time
Which airline was most reliable departing SDF?
Among qualifying SDF airline departure results, Delta Air Lines had the highest on-time rate: 88.2% of 2,724 flights. Allegiant Air was lowest at 68.0% across 759 flights.
| Airline | Flights | On time | 30+ min | Cancelled |
|---|---|---|---|---|
| Republic Airways | 5,694 | 82.3% | 10.3% | 2.6% |
| Southwest Airlines | 5,226 | 81.2% | 10.6% | 1.5% |
| Delta Air Lines | 2,724 | 88.2% | 7.5% | 1.6% |
| American Airlines | 2,551 | 76.0% | 14.7% | 2.8% |
| SkyWest Airlines | 2,082 | 74.9% | 16.5% | 2.4% |
| PSA Airlines | 2,012 | 74.3% | 15.1% | 3.9% |
| Envoy Air | 1,034 | 73.7% | 16.7% | 1.6% |
| Allegiant Air | 759 | 68.0% | 24.6% | 0.7% |
| United Airlines | 751 | 82.4% | 10.1% | 0.9% |
| Spirit Airlines | 472 | 76.1% | 13.6% | 4.4% |
Origin report, not airport-wide operations.
These figures summarize the reported scheduled passenger flights in the dataset, not every flight or every airport process.