Historical on-time performance
Dallas to Louisville
725 miData through May 2026Source: US DOT · BTS
Flights on DAL–SDF arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled1.9%of scheduled flights
based on 215 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time72%Medianon timep9045 minCancel1.9%Flights215
Why flights run late
Delay causes
- Airline45%
- Weather1%
- Air traffic (NAS)13%
- Late aircraft41%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather75%
- Air traffic (NAS)25%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 4 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 DAL → SDF
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Middays are the most reliable time of day to fly this route — 79% on time.
- Middays79% on time · p90 30 min · 505 flights
- Afternoons62% on time · p90 55 min · 133 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 77% on time.
- Saturdays77% on time · p90 25 min · 101 flights · limited
- Sundays71% on time · p90 40 min · 145 flights · limited
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