SDF to EWR flight delays & on-time performance
Nonstop flights from Louisville Muhammad Ali International Airport to Newark Liberty International Airport · 642 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SDF or EWR right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Louisville (SDF) to Newark (EWR) arrived on time 87% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 4.3% were cancelled, and 6% arrived an hour or more late.
- Departures scheduled around 8am did best (93% on time); around 1pm did worst (77%).
- Wednesday was the most reliable day to fly (94% on time) and Monday the least (80%).
- The largest source of delay minutes was air traffic control & airport congestion (42%).
Which airline is most on time from SDF to EWR?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Spirit Airlines | 100% | 0.0% | 0 min | 0.0% | 4 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 87% | 4.4% | 9 min | 5.5% | 985 |
| United Airlines | 33% | 0.0% | 58 min | 33.3% | 3 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am90%343 flights
- 8am93%200 flights
- 9am95%20 flights
- 10am100%18 flights
- 11am85%75 flights
- 12pm89%67 flights
- 1pm77%211 flights
- 2pm87%23 flights
- 3pm50%17 flights
- 4pm94%17 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday80%5.5% cancelled
- Tuesday89%5.5% cancelled
- Wednesday94%3.4% cancelled
- Thursday90%1.4% cancelled
- Friday85%2.7% cancelled
- Saturday86%2.5% cancelled
- Sunday84%9.2% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion42%
- Late-arriving aircraft28%
- Airline (crew, maintenance, cleaning, fueling)24%
- Extreme weather5%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather70%
- Air traffic control & airport congestion30%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
SDF to EWR: common questions
- How often are SDF to EWR flights on time?
- 87% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Louisville to Newark cancelled?
- 4.3% of scheduled flights were cancelled (43 of 992).
- How long are typical delays?
- Across all flights the average arrival delay was 10 min (early arrivals count as zero). Flights that were late arrived 67 min behind schedule on average, and 5.6% of flights were an hour or more late.
- How long is taxi time at SDF?
- Flights on this route spent 16 min taxiing from the gate to takeoff on average.
Related routes
Return trip: EWR to SDF — 81% on time
More flights from Louisville
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SDF → EWR, nonstop flights by US airlines that report to the DOT. How we calculate this.