Historical on-time performance
Detroit to Louisville
306 miData through Dec 2025Source: US DOT · BTS
Flights on DTW–SDF arrive on time 80% of the time over the last 12 months.
On-time rate80%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 1,159 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysbestOn-time84%Medianon timep9025 minCancel0.3%Flights577
- SkyWest AirlinesOn-time76%Medianon timep9050 minCancel1.0%Flights582
Why flights run late
Delay causes
- Airline61%
- Weather17%
- Air traffic (NAS)11%
- Late aircraft10%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly DTW → SDF
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Overnights are the most reliable time of day to fly this route — 88% on time.
- Overnights88% on time · p90 15 min · 874 flights
- Middays84% on time · p90 25 min · 891 flights
- Mornings82% on time · p90 30 min · 584 flights
- Afternoons82% on time · p90 35 min · 835 flights
- Evenings76% on time · p90 50 min · 275 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 79% to 86% on time.
- Wednesdays86% on time · p90 25 min · 502 flights
- Tuesdays85% on time · p90 25 min · 501 flights
- Saturdays85% on time · p90 25 min · 408 flights
- Thursdays84% on time · p90 25 min · 508 flights
- Mondays83% on time · p90 30 min · 522 flights
- Fridays82% on time · p90 30 min · 513 flights
- Sundays79% on time · p90 40 min · 505 flights
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