Historical on-time performance
Miami to Louisville
910 miData through May 2026Source: US DOT · BTS
Flights on MIA–SDF arrive on time 63% of the time over the last 12 months.
On-time rate63%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled1.8%of scheduled flights
based on 340 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- American AirlinesOn-time63%Medianon timep9065 minCancel1.8%Flights340
Why flights run late
Delay causes
- Airline36%
- Weather4%
- Air traffic (NAS)17%
- Late aircraft42%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline17%
- Weather83%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 6 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 MIA → SDF
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Afternoons are the most reliable time of day to fly this route — 79% on time.
- Afternoons79% on time · p90 35 min · 196 flights · limited
- Overnights66% on time · p90 70 min · 1,086 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 62% to 75% on time.
- Tuesdays75% on time · p90 50 min · 181 flights · limited
- Fridays73% on time · p90 55 min · 192 flights · limited
- Wednesdays70% on time · p90 45 min · 176 flights · limited
- Saturdays67% on time · p90 65 min · 227 flights
- Mondays66% on time · p90 70 min · 187 flights · limited
- Thursdays66% on time · p90 80 min · 190 flights · limited
- Sundays62% on time · p90 80 min · 196 flights · limited
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