Route on-time record
EWR to SDF: most on-time flights and the best time to fly
Newark (Newark Liberty International Airport) to Louisville (Louisville Muhammad Ali International Airport). 954 nonstop flights in Jun 2025 to May 2026, 82% arrived within 15 minutes and 4.8% were cancelled. The most reliable flight number was Republic 3629 at 10:41 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
EWR → SDF
Newark to Louisville: 954 nonstop flights a year
On time (12 months)
82%
Cancelled
4.8%
avg delay 15 min
Best time to leave
9 AM to noon
88% on time vs 76% 6 to 9 PM
Most reliable airline
Republic
78% chance on time
Lowest nonstop fare seen in the next two months: $303 (United 3609 on 2026-10-21). Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · Republic 3629 · sold as American Eagle, Delta Connection or United Express
10:41 AM → 1:11 PM2h 30m nonstop
Local times, typical schedule. Last flown 2026-05-20.
87%
chance on time
- On time (history)
- 94%
- Cancelled
- 4.3%
- Avg arrival delay
- 2 min
- Arrived on time 94% of the time (89 flights, Jun 2025 to May 2026).
- Cancelled 4.3% of the time (4 of 93).
- Leaves in this route's most on-time window (9 AM to noon: 88% on time; 6 to 9 PM: 76%).
- Departs outside EWR's trouble window (1 PM to 7 PM, when 65% of its 259 ground stops and delay programs started).
Moderate track record · 89 flights
Find 10:41 AM flight fares Opens this date on Aviasales#2 · Republic 3412 · sold as American Eagle, Delta Connection or United Express
4:59 PM → 7:22 PM2h 23m nonstop
Local times, typical schedule. Last flown 2026-05-19.
86%
chance on time
- On time (history)
- 100%
- Cancelled
- 4.8%
- Avg arrival delay
- 1 min
- Arrived on time 100% of the time (20 flights, Jun 2025 to May 2026).
- Departs inside EWR's trouble window: 65% of its 259 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (20 flights), so its score leans on the airline's record at this hour.
Limited track record · 20 flights
Find 4:59 PM flight fares Opens this date on Aviasales#3 · Republic 3421 · sold as American Eagle, Delta Connection or United Express
10:05 AM → 12:21 PM2h 16m nonstop
Local times, typical schedule. Last flown 2026-05-31.
85%
chance on time
- On time (history)
- 100%
- Cancelled
- 0.0%
- Avg arrival delay
- 0 min
- Arrived on time 100% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 88% on time; 6 to 9 PM: 76%).
- Departs outside EWR's trouble window (1 PM to 7 PM, when 65% of its 259 ground stops and delay programs started).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find 10:05 AM flight fares Opens this date on Aviasales#4 · Republic 3415 · sold as American Eagle, Delta Connection or United Express
5:32 PM → 7:59 PM2h 27m nonstop
Local times, typical schedule. Last flown 2026-05-31.
82%
chance on time
- On time (history)
- 91%
- Cancelled
- 0.0%
- Avg arrival delay
- 5 min
- Arrived on time 91% of the time (43 flights, Jun 2025 to May 2026).
- Never cancelled in 43 scheduled flights.
- Departs inside EWR's trouble window: 65% of its 259 ground stops and delay programs started between 1 PM and 7 PM.
- Short track record (43 flights), so its score leans on the airline's record at this hour.
Limited track record · 43 flights
Find 5:32 PM flight fares Opens this date on Aviasales#5 · Republic 3579 · sold as American Eagle, Delta Connection or United Express
10:30 AM → 1:06 PM2h 36m nonstop
Local times, typical schedule. Last flown 2026-03-27.
80%
chance on time
- On time (history)
- 75%
- Cancelled
- 0.0%
- Avg arrival delay
- 11 min
- Arrived on time 75% of the time (20 flights, Jun 2025 to May 2026).
- Leaves in this route's most on-time window (9 AM to noon: 88% on time; 6 to 9 PM: 76%).
- Departs outside EWR's trouble window (1 PM to 7 PM, when 65% of its 259 ground stops and delay programs started).
- 53% of its delay minutes came from the plane arriving late from an earlier flight.
Limited track record · 20 flights
Find 10:30 AM flight fares Opens this date on Aviasales#6 · Republic 3531 · sold as American Eagle, Delta Connection or United Express
5:05 PM → 7:31 PM2h 26m nonstop
Local times, typical schedule. Last flown 2026-03-28.
77%
chance on time
- On time (history)
- 80%
- Cancelled
- 6.3%
- Avg arrival delay
- 13 min
- Arrived on time 80% of the time (177 flights, Jun 2025 to May 2026).
- Cancelled 6.3% of the time (12 of 190).
- Departs inside EWR's trouble window: 65% of its 259 ground stops and delay programs started between 1 PM and 7 PM.
- 65% of its delay minutes came from the plane arriving late from an earlier flight.
Moderate track record · 177 flights
Find 5:05 PM flight fares Opens this date on Aviasales#7 · Republic 3714 · sold as American Eagle, Delta Connection or United Express
8:45 PM → 11:12 PM2h 27m nonstop
Local times, typical schedule. Last flown 2026-05-19.
74%
chance on time
- On time (history)
- 81%
- Cancelled
- 1.9%
- Avg arrival delay
- 8 min
- Arrived on time 81% of the time (52 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 76% on time; 9 AM to noon: 88%).
- Departs outside EWR's trouble window (1 PM to 7 PM, when 65% of its 259 ground stops and delay programs started).
- Short track record (52 flights), so its score leans on the airline's record at this hour.
Limited track record · 52 flights
Find 8:45 PM flight fares Opens this date on Aviasales#8 · Republic 3483 · sold as American Eagle, Delta Connection or United Express
8:25 PM → 10:50 PM2h 25m nonstop
Local times, typical schedule. Last flown 2026-05-31.
73%
chance on time
- On time (history)
- 82%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 82% of the time (11 flights, Jun 2025 to May 2026).
- Leaves in this route's least on-time window (6 to 9 PM: 76% on time; 9 AM to noon: 88%).
- Departs outside EWR's trouble window (1 PM to 7 PM, when 65% of its 259 ground stops and delay programs started).
- Short track record (11 flights), so its score leans on the airline's record at this hour.
Limited track record · 11 flights
Find 8:25 PM flight fares Opens this date on Aviasales#9 · Republic 3609 · sold as American Eagle, Delta Connection or United Express
9:26 PM → 11:59 PM2h 33m nonstop
Local times, typical schedule. Last flown 2026-03-28.
71%
chance on time
- On time (history)
- 76%
- Cancelled
- 9.1%
- Avg arrival delay
- 22 min
- Arrived on time 76% of the time (249 flights, Jun 2025 to May 2026).
- Cancelled 9.1% of the time (25 of 274).
- Departs outside EWR's trouble window (1 PM to 7 PM, when 65% of its 259 ground stops and delay programs started).
- 60% of its delay minutes came from the plane arriving late from an earlier flight.
Strong track record · 249 flights
Find 9:26 PM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Republic Airways (sold as American Eagle, Delta Connection or United Express)78%
929 flights · 82% on time as flown · 4.8% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- 9 AM to noon88%
325 flights · avg delay 7 min
- 3 to 6 PM84%
217 flights · avg delay 11 min
- 6 to 9 PM76%
295 flights · avg delay 23 min
- After 9 PM81%
88 flights · avg delay 21 min
Best day: Saturday (87%). Worst: Sunday (82%).
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Late-arriving aircraft48%
- Airline (crew, maintenance, boarding)28%
- Air traffic control and airport volume23%
- Severe weather1%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
EWR to SDF questions
- What time of day is best to fly EWR to SDF?
- 9 AM to noon: 88% of flights arrived on time, against 76% for departures 6 to 9 PM.
- Which airline is most on time from EWR to SDF?
- Republic, with a season-adjusted 78% chance of operating and arriving on time over 929 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on EWR to SDF?
- July (68% on time); the best was February (91%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from EWR
- SDF to EWR (return)
- EWR to MCO 76%
- EWR to ATL 77%
- EWR to ORD 71%
- EWR to LAX 72%
- EWR to FLL 75%
- EWR to SFO 71%
- EWR to MIA 77%
- EWR to BOS 71%
- EWR to CLT 80%
- EWR to IAH 79%
- EWR to DTW 79%
- EWR to PBI 77%
Live status: FAA delays and ground stops