Reliable Flight Search
BetaThe insider way to pick a flight: on-time records, the odds each connection is made, legroom and the age of the planes that actually fly the route. Things airline sites and the big booking sites don’t show you. US airlines and airports.
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.
Best trips
9 nonstop, 35 with 1 connection · ranked by overall best · published legroom for 0 of 44
Top pick#1 · Nonstop · 2h 16m
10:05 AM → 12:21 PM
83
score
85%
arrive on time
89% on time · 4.5% cancel10:05 AM EWR → 12:21 PM SDF2h 16m
Republic 3421 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 2–11 yrs oldLegroom: not published for this aircraft and cabin yetFind 10:05 AM flight fares Opens this date on Aviasales#2 · Nonstop · 2h 23m
4:59 PM → 7:22 PM
83
score
86%
arrive on time
90% on time · 4.8% cancel4:59 PM EWR → 7:22 PM SDF2h 23m
Republic 3412 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 1–9 yrs oldLegroom: not published for this aircraft and cabin yetFind 4:59 PM flight fares Opens this date on Aviasales#3 · Nonstop · 2h 30m
10:41 AM → 1:11 PM
82
score
87%
arrive on time
91% on time · 4.6% cancel10:41 AM EWR → 1:11 PM SDF2h 30m
Republic 3629 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 2–11 yrs oldLegroom: not published for this aircraft and cabin yetFind 10:41 AM flight fares Opens this date on Aviasales#4 · Nonstop · 2h 27m
5:32 PM → 7:59 PM
77
score
82%
arrive on time
85% on time · 3.8% cancel5:32 PM EWR → 7:59 PM SDF2h 27m
Republic 3415 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 1–11 yrs oldLegroom: not published for this aircraft and cabin yetFind 5:32 PM flight fares Opens this date on Aviasales#5 · Nonstop · 2h 36m
10:30 AM → 1:06 PM
70
score
80%
arrive on time
84% on time · 4.3% cancel10:30 AM EWR → 1:06 PM SDF2h 36m
Republic 3579 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 2–11 yrs oldLegroom: not published for this aircraft and cabin yetFind 10:30 AM flight fares Opens this date on Aviasales#6 · Nonstop · 2h 26m
5:05 PM → 7:31 PM
65
score
77%
arrive on time
81% on time · 5.7% cancel5:05 PM EWR → 7:31 PM SDF2h 26m
Republic 3531 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 2–11 yrs oldLegroom: not published for this aircraft and cabin yetFind 5:05 PM flight fares Opens this date on Aviasales#7 · Nonstop · 2h 27m
8:45 PM → 11:12 PM
64
score
74%
arrive on time
77% on time · 4.1% cancel8:45 PM EWR → 11:12 PM SDF2h 27m
Republic 3714 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 2–11 yrs oldLegroom: not published for this aircraft and cabin yetFind 8:45 PM flight fares Opens this date on Aviasales#8 · Nonstop · 2h 25m
8:25 PM → 10:50 PM
60
score
73%
arrive on time
77% on time · 4.5% cancel8:25 PM EWR → 10:50 PM SDF2h 25m
Republic 3483 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 3–11 yrs oldLegroom: not published for this aircraft and cabin yetFind 8:25 PM flight fares Opens this date on Aviasales#9 · Nonstop · 2h 33m
9:26 PM → 11:59 PM
59
score
71%
arrive on time
77% on time · 7.6% cancel9:26 PM EWR → 11:59 PM SDF2h 33m
Republic 3609 · sold as American Eagle, Delta Connection or United Express
Embraer E175 · 1–11 yrs oldLegroom: not published for this aircraft and cabin yetFind 9:26 PM flight fares Opens this date on Aviasales#10 · 1 connection · 6h 12m · one ticket (American)
11:00 AM → 5:12 PM
37
score
90%
connections made
73%
arrive on time
91% on time · 4.3% cancel11:00 AM EWR → 1:09 PM CLT2h 09m
Republic 3550 · sold as American Eagle
Embraer E175 · 2–21 yrs oldLegroom: not published for this aircraft and cabin yetConnect in CLT · 2h 21m · 95% chance to make it · same ticket: the airline rebooks you if you miss it81% on time · 1.2% cancel3:30 PM CLT → 5:12 PM SDF1h 42m
PSA 5391 · sold as American Eagle
Bombardier CRJ900 · 9–12 yrs oldLegroom: not published for this aircraft and cabin yetFind this American trip Look for Republic 3550 + PSA 5391 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. Legroom is the seat pitch the airline or a seat-map source publishes for that aircraft and cabin; we never estimate it, and seat maps change, so check the airline’s seat map when you book.
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%).
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