Historical on-time performance
Atlanta to Louisville
321 miData through Dec 2025Source: US DOT · BTS
Flights on ATL–SDF arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.4%of scheduled flights
based on 2,636 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Delta Air LinesOn-time80%Medianon timep9035 minCancel1.4%Flights2,575
- Southwest AirlinesOn-time87%Medianon timep9010 minCancel3.3%Flights61
Why flights run late
Delay causes
- Airline44%
- Weather10%
- Air traffic (NAS)20%
- Late aircraft26%
- 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 ATL → SDF
All airlines · rolling 36 months (2023-01 .. 2025-12).
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 · 1,727 flights
- Middays88% on time · p90 15 min · 2,043 flights
- Afternoons83% on time · p90 25 min · 1,297 flights
- Evenings77% on time · p90 40 min · 1,526 flights
- Overnights76% on time · p90 40 min · 1,957 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 87% on time.
- Tuesdays87% on time · p90 20 min · 1,197 flights
- Wednesdays85% on time · p90 25 min · 1,200 flights
- Thursdays84% on time · p90 25 min · 1,280 flights
- Saturdays84% on time · p90 25 min · 1,023 flights
- Mondays82% on time · p90 30 min · 1,305 flights
- Fridays81% on time · p90 35 min · 1,292 flights
- Sundays77% on time · p90 40 min · 1,253 flights
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