Historical on-time performance
Louisville to Washington
474 miData through Dec 2025Source: US DOT · BTS
Flights on SDF–DCA arrive on time 70% of the time over the last 12 months.
On-time rate70%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled6.6%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
- Republic AirwaysbestOn-time85%Medianon timep9020 minCancel1.4%Flights370
- PSA AirlinesOn-time60%Medianon timep9085 minCancel9.9%Flights584
Why flights run late
Delay causes
- Airline15%
- Weather10%
- Air traffic (NAS)26%
- Late aircraft48%
- Security1%
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 SDF → DCA
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 — 86% on time.
- Mornings86% on time · p90 15 min · 1,067 flights
- Middays83% on time · p90 25 min · 988 flights
- Afternoons79% on time · p90 40 min · 266 flights
- Overnights74% on time · p90 50 min · 173 flights · limited
- Evenings65% on time · p90 75 min · 702 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 76% to 84% on time.
- Saturdays84% on time · p90 20 min · 347 flights
- Mondays81% on time · p90 35 min · 483 flights
- Tuesdays80% on time · p90 40 min · 488 flights
- Wednesdays79% on time · p90 35 min · 487 flights
- Fridays79% on time · p90 35 min · 476 flights
- Thursdays79% on time · p90 35 min · 475 flights
- Sundays76% on time · p90 50 min · 440 flights
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