OnTimeStats

Airport on-time performance

SDF

Louisville

Data through Dec 2025Source: US DOT · BTS
On-time rate79%flights departing here that arrived on time
Median delayon timetypical departure delay
p90 delay40 min1 in 10 departures is worsetail risk
Cancelled2.0%of scheduled departures
Left the gate on time82%departures that pushed back within 15 min of schedule (DepDel15)

based on 23,039 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

As a connection hub

Arriving here (inbound performance)

These figures reflect inbound flights arriving at this airport — relevant for connections and layovers.

76%arrived on time here
(within 15 min, inbound flights)
  • On time76%
  • 15–59 min late14%
  • 1–2 hr late5%
  • 2 hr+ late3%
  • Cancelled or diverted2%

Arrival outcomes for inbound flights. Last segment = cancelled or diverted.

Bad day: 1 in 10 flights arrives more than 50 min late.

By airline

Carriers departing here (last 12 months)

Delay = arrival delay (ArrDel15-based)

  • Spirit Airlinesbest
    On-time90%
    Medianon time
    p9010 min
    Cancel3.3%
    Flights30
  • Delta Air Lines
    On-time86%
    Medianon time
    p9020 min
    Cancel1.4%
    Flights2,575
  • Republic Airways
    On-time82%
    Medianon time
    p9030 min
    Cancel1.8%
    Flights5,602
  • Southwest Airlines
    On-time82%
    Medianon time
    p9030 min
    Cancel1.3%
    Flights4,450
  • United Airlines
    On-time80%
    Medianon time
    p9035 min
    Cancel0.9%
    Flights668
  • SkyWest Airlines
    On-time78%
    Medianon time
    p9050 min
    Cancel1.4%
    Flights1,592
  • Envoy Air
    On-time74%
    Medianon time
    p9050 min
    Cancel2.5%
    Flights1,009
  • American Airlines
    On-time74%
    Medianon time
    p9055 min
    Cancel2.5%
    Flights2,366
  • PSA Airlines
    On-time67%
    Medianon time
    p9080 min
    Cancel5.3%
    Flights1,821

Over time

Departure on-time trend

By season

On-time rate by month

Where flights go

Busiest routes

SDF → ATL→SDF → ORD→SDF → MDW→SDF → DFW→SDF → BWI→SDF → CLT→SDF → DTW→SDF → STL→SDF → EWR→SDF → IAH→
Advertisement

Will you make a connection at SDF? →

Methodology

A flight is on time when it arrives within 15 minutes of schedule — the US DOT / BTS standard. Median and p90(the “1-in-10 bad day”) are read from the full arrival-delay distribution, never averaged across periods.

Figures cover a carrier’s own BTS-coded flights. Cells below ~200 flights are flagged as limited data. All numbers are pre-computed from public BTS On-Time Performance data.