Historical on-time performance
Atlanta to Louisville
321 miData through May 2026Source: US DOT · BTS
Flights on ATL–SDF arrive on time 82% of the time over the last 12 months.
On-time rate82%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled1.8%of scheduled flights
based on 2,694 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesOn-time82%Medianon timep9030 minCancel1.8%Flights2,694
Why flights run late
Delay causes
- Airline48%
- Weather9%
- Air traffic (NAS)18%
- Late aircraft24%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline63%
- Weather38%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 48 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 ATL → 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 — 90% on time.
- Mornings90% on time · p90 10 min · 1,634 flights
- Middays87% on time · p90 20 min · 2,031 flights
- Afternoons82% on time · p90 30 min · 1,301 flights
- Evenings77% on time · p90 40 min · 1,523 flights
- Overnights77% on time · p90 40 min · 1,951 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 85% on time.
- Tuesdays85% on time · p90 25 min · 1,170 flights
- Wednesdays85% on time · p90 20 min · 1,172 flights
- Thursdays85% on time · p90 25 min · 1,268 flights
- Saturdays83% on time · p90 25 min · 1,019 flights
- Fridays82% on time · p90 30 min · 1,282 flights
- Mondays81% on time · p90 30 min · 1,279 flights
- Sundays77% on time · p90 40 min · 1,250 flights
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