Historical on-time performance
Louisville to Boston
Flights on SDF–BOS arrive on time 69% 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.
- Republic AirwaysOn-time71%Medianon timep9070 minCancel2.3%Flights527
- Envoy AirOn-time45%Median15 minp90100 minCancel0.0%Flights60
Why flights run late
Delay causes
- Airline13%
- Weather7%
- Air traffic (NAS)58%
- Late aircraft22%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline8%
- Weather42%
- Air traffic (NAS)50%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). Shares are among 12 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 SDF → BOS
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 — 87% on time.
- Mornings87% on time · p90 20 min · 180 flights · limited
- Middays75% on time · p90 50 min · 582 flights
- Evenings73% on time · p90 50 min · 369 flights
- Afternoons72% on time · p90 70 min · 1,078 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 67% to 83% on time.
- Saturdays83% on time · p90 35 min · 246 flights
- Tuesdays78% on time · p90 60 min · 325 flights
- Wednesdays74% on time · p90 55 min · 324 flights
- Mondays73% on time · p90 60 min · 329 flights
- Thursdays73% on time · p90 60 min · 327 flights
- Fridays71% on time · p90 70 min · 326 flights
- Sundays67% on time · p90 70 min · 332 flights
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