Historical on-time performance
Chicago to Louisville
286 miData through May 2026Source: US DOT · BTS
Flights on ORD–SDF arrive on time 74% of the time over the last 12 months.
On-time rate74%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled2.8%of scheduled flights
based on 2,684 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Envoy AirbestOn-time83%Medianon timep9030 minCancel1.1%Flights461
- Republic AirwaysOn-time72%Medianon timep9060 minCancel3.4%Flights1,709
- SkyWest AirlinesOn-time69%Medianon timep9070 minCancel2.1%Flights514
Why flights run late
Delay causes
- Airline23%
- Weather7%
- Air traffic (NAS)19%
- Late aircraft51%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline3%
- Weather66%
- Air traffic (NAS)31%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 74 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly ORD → SDF
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 84% on time.
- Mornings84% on time · p90 30 min · 1,080 flights
- Middays78% on time · p90 45 min · 1,018 flights
- Evenings76% on time · p90 45 min · 2,214 flights
- Afternoons75% on time · p90 45 min · 1,534 flights
- Overnights70% on time · p90 65 min · 1,192 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 72% to 79% on time.
- Wednesdays79% on time · p90 50 min · 985 flights
- Tuesdays79% on time · p90 45 min · 966 flights
- Thursdays77% on time · p90 45 min · 1,044 flights
- Saturdays77% on time · p90 35 min · 946 flights
- Fridays76% on time · p90 45 min · 1,043 flights
- Mondays74% on time · p90 50 min · 1,037 flights
- Sundays72% on time · p90 50 min · 1,017 flights
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