Louisville (SDF) to Newark (EWR): On-Time Performance
Data through July 2026
Louisville (SDF) to Newark (EWR) has an unusually high scrub rate — 4% of scheduled departures never left the gate, a cancellation rate several times the national figure. When flights do go, 86% land on time, no worse than the national average of 78%.
- On-time
- 86%
- arrived <15 min late
- Avg delay
- 11 min
- completed flights
- Cancelled
- 4.0%
- Flights/day
- 2.7
- last 12 months
- Duration
- 2h 14m
- scheduled
- Distance
- 642 mi
Monthly on-time trend
Best time to fly from SDF to EWR
Aim for departures around 10 a.m. (97% on-time); avoid 3 p.m. departures (64%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 13 min |
| Tuesdaybest | 90% | 6 min |
| Wednesday | 89% | 5 min |
| Thursday | 85% | 15 min |
| Friday | 84% | 11 min |
| Saturday | 87% | 13 min |
| Sunday | 81% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft20%
- Airline operations23%
- National airspace system53%
- Weather4%
Frequently asked questions
- How often are flights from SDF to EWR delayed?
- 15% of SDF–EWR flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 11 minutes.
- What is the best time of day to fly from SDF to EWR?
- Departures around 10 a.m. have the best record (97% on-time), while departures around 3 p.m. have the worst (64%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SDF to EWR?
- The scheduled SDF–EWR flight time averages 2h 14m over 642 miles. Actual arrival times vary — flights on this route land 15+ minutes late 15% of the time.
- How often are SDF to EWR flights cancelled?
- 4% of scheduled flights on this route were cancelled between 2024-07 and 2026-07 — several times the typical US rate, so consider earlier departures or backup options.
- What is the worst month to fly from SDF to EWR?
- May 2025 was the roughest month in this dataset, with only 61% of arrivals on time. The best was May 2026 at 97%. If your dates are flexible, that 36-point gap is worth planning around.
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Based on 1,989 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.