Historical on-time performance
Washington to Louisville
474 miData through Dec 2025Source: US DOT · BTS
Flights on DCA–SDF arrive on time 62% of the time over the last 12 months.
On-time rate62%arrived within 15 min
p90 delay75 min1 in 10 flights is worse (tail risk)
Cancelled8.0%of scheduled flights
based on 954 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.
- Republic AirwaysOn-time66%Medianon timep9085 minCancel6.8%Flights370
- PSA AirlinesOn-time60%Medianon timep9070 minCancel8.7%Flights584
Why flights run late
Delay causes
- Airline25%
- Weather4%
- Air traffic (NAS)17%
- Late aircraft55%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly DCA → SDF
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 71% to 83% on time.
- Middays83% on time · p90 30 min · 386 flights
- Mornings82% on time · p90 25 min · 952 flights
- Overnights82% on time · p90 30 min · 449 flights
- Afternoons72% on time · p90 60 min · 552 flights
- Evenings71% on time · p90 60 min · 858 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 82% on time.
- Saturdays82% on time · p90 25 min · 347 flights
- Mondays80% on time · p90 35 min · 483 flights
- Tuesdays78% on time · p90 35 min · 488 flights
- Thursdays77% on time · p90 40 min · 475 flights
- Wednesdays77% on time · p90 45 min · 487 flights
- Fridays76% on time · p90 45 min · 477 flights
- Sundays74% on time · p90 50 min · 440 flights
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