Best Time to Fly DCA to SDF: On-Time Stats by Hour & Airline
Ronald Reagan Washington National → Louisville Muhammad Ali International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.2% of Washington (DCA) to Louisville (SDF) flights arrived on time (1,031 scheduled flights). That is 2.5 points below the national average of 77.6%.
Among 2 airlines, PSA Airlines led with 75.9% on time and Republic Airways was last with 74.0%.
Over 24 months, Saturday was the most reliable day (82% on time) and July the worst month (63%).
The cancellation rate was 5.1% (US average 1.8%).
DCA to SDF on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| PSA Airlines | 75.9% | 61 min | 5.1% | 551 |
| Republic Airways | 74.0% | 76 min | 5.2% | 462 |
| Envoy Air | Limited data | 13 | ||
| American Airlines | Limited data | 5 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DCA to SDF
On-time arrival % by scheduled departure hour (local time), 2,036 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 6 | |
| 7am–8am | 90.2% | 5.9% | 119 |
| 8am–9am | 79.5% | 5.8% | 538 |
| 9am–10am | Limited data | 5 | |
| 10am–11am | Limited data | 11 | |
| 11am–12pm | 66.7% | 5.3% | 38 |
| 12pm–1pm | Limited data | 28 | |
| 1pm–2pm | 68.8% | 3.6% | 83 |
| 2pm–3pm | 71.8% | 2.2% | 178 |
| 3pm–4pm | 84.0% | 0.9% | 107 |
| 4pm–5pm | 48.4% | 10.6% | 104 |
| 5pm–6pm | 53.7% | 13.4% | 142 |
| 6pm–7pm | Limited data | 12 | |
| 7pm–8pm | 74.5% | 7.0% | 517 |
| 8pm–9pm | 72.7% | 7.4% | 95 |
| 9pm–10pm | Limited data | 26 | |
| 10pm–11pm | Limited data | 27 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DCA to SDF
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 63.9% | -12.3 pts | 0.0% | 36 |
| Christmas & New Year (Dec 20 - Jan 3) | 93.8% | +17.5 pts | 0.0% | 32 |
| Summer peak (Jun 15 - Aug 15) | 64.6% | -11.6 pts | 12.5% | 353 |
| All other days | 76.2% | — | 4.9% | 1,615 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).