Historical on-time performance
Boston to Louisville
Flights on BOS–SDF arrive on time 83% of the time over the last 12 months.
based on 587 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.
- Envoy AirOn-time90%Medianon timep9010 minCancel0.0%Flights60
- Republic AirwaysOn-time82%Medianon timep9025 minCancel1.7%Flights527
Why flights run late
Delay causes
- Airline37%
- Weather2%
- Air traffic (NAS)23%
- Late aircraft37%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline11%
- Weather56%
- Air traffic (NAS)33%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 9 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 BOS → SDF
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 69% to 89% on time.
- Middays89% on time · p90 15 min · 1,227 flights
- Mornings88% on time · p90 10 min · 443 flights
- Afternoons85% on time · p90 20 min · 380 flights
- Overnights69% on time · p90 70 min · 146 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 84% to 89% on time.
- Wednesdays89% on time · p90 15 min · 324 flights
- Tuesdays88% on time · p90 10 min · 325 flights
- Saturdays88% on time · p90 15 min · 250 flights
- Fridays87% on time · p90 25 min · 326 flights
- Thursdays86% on time · p90 20 min · 328 flights
- Mondays85% on time · p90 20 min · 329 flights
- Sundays84% on time · p90 30 min · 326 flights
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