Best Time to Fly EWR to SDF: On-Time Stats by Hour & Airline
Newark Liberty International → Louisville Muhammad Ali International
Data through July 2026 · Last updated October 18, 2026
992 flights were scheduled from Newark (EWR) to Louisville (SDF) in the last 12 months, and 81.3% of those that flew arrived on time, 3.7 points above the US average of 77.6%.
Republic Airways was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (86% on time) and July the worst month (74%).
The cancellation rate was 5.1% (US average 1.8%).
EWR 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 |
|---|---|---|---|---|
| Republic Airways | 81.2% | 76 min | 5.2% | 985 |
| Spirit Airlines | Limited data | 4 | ||
| United Airlines | Limited data | 3 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly EWR to SDF
On-time arrival % by scheduled departure hour (local time), 1,928 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 10 | |
| 7am–8am | Limited data | 1 | |
| 8am–9am | Limited data | 4 | |
| 9am–10am | 87.6% | 2.1% | 190 |
| 10am–11am | 87.1% | 1.7% | 356 |
| 11am–12pm | 85.6% | 0.9% | 112 |
| 12pm–1pm | Limited data | 20 | |
| 1pm–2pm | Limited data | 1 | |
| 2pm–3pm | Limited data | 8 | |
| 3pm–4pm | Limited data | 1 | |
| 4pm–5pm | 85.8% | 2.9% | 239 |
| 5pm–6pm | 81.9% | 4.0% | 202 |
| 6pm–7pm | 81.4% | 7.1% | 127 |
| 7pm–8pm | 80.1% | 6.0% | 166 |
| 8pm–9pm | 72.9% | 8.4% | 371 |
| 9pm–10pm | 79.8% | 9.2% | 120 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on EWR 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) | 75.7% | -7.2 pts | 0.0% | 37 |
| Christmas & New Year (Dec 20 - Jan 3) | 81.8% | -1.1 pts | 1.8% | 56 |
| Summer peak (Jun 15 - Aug 15) | 76.3% | -6.6 pts | 9.1% | 320 |
| All other days | 82.9% | — | 3.8% | 1,515 |
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).