ATIS Alerts Smart Flight Search
Find the flight least likely to be delayed
BetaWe rank real flight numbers by how often they flew and arrived on time over the last 12 months, adjusted for your travel month and departure time, then check nearby airports and calmer connections. US airlines and airports.
SDF → EWR
Louisville to Newark: 953 nonstop flights a year
On time (12 months)
86%
Cancelled
4.2%
avg delay 10 min
Best time to leave
9 AM to noon
93% on time vs 72% 3 to 6 PM
Most reliable airline
Republic
83% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Best trips
5 nonstop, 38 with 1 connection. Best overall weighs the chance you arrive on time as booked, connection odds, travel time and separate tickets.
Best overall#1 · Nonstop · 2h 13m
8:47 AM → 11:00 AM
89%
arrive on time
92% on time · 3.1% cancel8:47 AM SDF → 11:00 AM EWR2h 13m
Republic 3682 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 2–11 yrs oldFind 8:47 AM flight fares Opens this date on Aviasales#2 · Nonstop · 2h 13m
4:17 PM → 6:30 PM
87%
arrive on time
91% on time · 4.3% cancel4:17 PM SDF → 6:30 PM EWR2h 13m
Republic 3592 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 2–11 yrs oldFind 4:17 PM flight fares Opens this date on Aviasales#3 · Nonstop · 2h 12m
6:00 AM → 8:13 AM
86%
arrive on time
90% on time · 4.1% cancel6:00 AM SDF → 8:13 AM EWR2h 12m
Republic 3594 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 2–11 yrs oldFind 6:00 AM flight fares Opens this date on Aviasales#4 · Nonstop · 2h 23m
1:05 PM → 3:28 PM
80%
arrive on time
83% on time · 3.8% cancel1:05 PM SDF → 3:28 PM EWR2h 23m
Republic 3661 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 2–11 yrs oldFind 1:05 PM flight fares Opens this date on Aviasales#5 · Nonstop · 2h 12m
1:47 PM → 3:59 PM
75%
arrive on time
78% on time · 4.3% cancel1:47 PM SDF → 3:59 PM EWR2h 12m
Republic 3452 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 2–11 yrs oldFind 1:47 PM flight fares Opens this date on Aviasales#6 · 1 connection · 5h 20m · one ticket (United)
5:00 AM → 10:20 AM
86%
connections made
78%
arrive on time
88% on time · 3.7% cancel5:00 AM SDF → 5:40 AM ORD1h 40m
SkyWest 6019 · sold as United Express
Embraer E175 · 6–12 yrs oldConnect in ORD · 1h 20m · 91% chance to make it · same ticket: the airline rebooks you if you miss it90% on time · 1.4% cancel7:00 AM ORD → 10:20 AM EWR2h 20m
United 563
Boeing 737-900ER · 1–17 yrs oldFind this United trip Look for SkyWest 6019 + United 563 on Aviasales#7 · 1 connection · 6h 15m · one ticket
7:45 AM → 2:00 PM
92%
connections made
79%
arrive on time
90% on time · 0.3% cancel7:45 AM SDF → 9:11 AM DTW1h 26m
Republic 5824 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 18–19 yrs oldConnect in DTW · 3h 00m · 98% chance to make it · same ticket: the airline rebooks you if you miss it86% on time · 5.4% cancel12:11 PM DTW → 2:00 PM EWR1h 49m
Republic 3706 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 1–11 yrs oldFind this one-ticket trip Look for Republic 5824 + Republic 3706 on Aviasales#8 · 1 connection · 6h 55m · one ticket (American)
6:31 AM → 1:26 PM
93%
connections made
81%
arrive on time
94% on time · 1.3% cancel6:31 AM SDF → 8:10 AM CLT1h 39m
Envoy 3666 · sold as American Eagle
Embraer E175 · 3–11 yrs oldConnect in CLT · 3h 10m · 99% chance to make it · same ticket: the airline rebooks you if you miss it87% on time · 4.4% cancel11:20 AM CLT → 1:26 PM EWR2h 06m
Republic 3448 · sold as American Eagle
Embraer E175 · 3–11 yrs oldFind this American trip Look for Envoy 3666 + Republic 3448 on Aviasales#9 · 1 connection · 5h 53m · one ticket (American)
7:33 AM → 1:26 PM
89%
connections made
77%
arrive on time
88% on time · 2.3% cancel7:33 AM SDF → 9:10 AM CLT1h 37m
American 1086
Boeing 737-800 · 10–26 yrs oldConnect in CLT · 2h 10m · 96% chance to make it · same ticket: the airline rebooks you if you miss it87% on time · 4.4% cancel11:20 AM CLT → 1:26 PM EWR2h 06m
Republic 3448 · sold as American Eagle
Embraer E175 · 3–11 yrs oldFind this American trip Look for American 1086 + Republic 3448 on Aviasales#10 · 1 connection · 5h 59m · one ticket (American)
6:31 AM → 12:30 PM
92%
connections made
78%
arrive on time
94% on time · 1.3% cancel6:31 AM SDF → 8:10 AM CLT1h 39m
Envoy 3666 · sold as American Eagle
Embraer E175 · 3–11 yrs oldConnect in CLT · 2h 22m · 97% chance to make it · same ticket: the airline rebooks you if you miss it84% on time · 3.2% cancel10:32 AM CLT → 12:30 PM EWR1h 58m
American 1390
Boeing 737-800 · 9–26 yrs oldFind this American trip Look for Envoy 3666 + American 1390 on Aviasales
Aircraft and ages come from the planes each flight number actually flew in the last 3 months of data (FAA registry build years); airlines can swap planes.
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- Republic Airways (sold as American Eagle, Delta Connection or United Express)83%
929 flights · 86% on time as flown · 4.1% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM91%
543 flights · avg delay 6 min
- 9 AM to noon93%
61 flights · avg delay 6 min
- Noon to 3 PM77%
307 flights · avg delay 18 min
- 3 to 6 PM72%
34 flights · avg delay 19 min
Best day: Tuesday (91%). Worst: Friday (84%).
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