Historical on-time performance
Louisville to Washington
474 miData through May 2026Source: US DOT · BTS
Flights on SDF–DCA arrive on time 75% of the time over the last 12 months.
On-time rate75%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled5.1%of scheduled flights
based on 1,011 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysbestOn-time87%Medianon timep9015 minCancel1.7%Flights421
- PSA AirlinesOn-time66%Medianon timep9080 minCancel7.6%Flights590
Why flights run late
Delay causes
- Airline31%
- Weather8%
- Air traffic (NAS)23%
- Late aircraft38%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline10%
- Weather81%
- Air traffic (NAS)8%
- Security2%
Most cancellations here are attributed to Weather. Shares are among 52 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 → DCA
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 15 min · 1,084 flights
- Middays81% on time · p90 30 min · 994 flights
- Afternoons66% on time · p90 85 min · 312 flights
- Evenings65% on time · p90 80 min · 654 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 82% on time.
- Saturdays82% on time · p90 25 min · 359 flights
- Tuesdays78% on time · p90 40 min · 465 flights
- Thursdays77% on time · p90 40 min · 456 flights
- Wednesdays77% on time · p90 40 min · 464 flights
- Mondays76% on time · p90 50 min · 459 flights
- Fridays76% on time · p90 45 min · 458 flights
- Sundays75% on time · p90 55 min · 432 flights
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