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3,323 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 77%.

Best time to leave 8–9 am 92% arrive on time from ORD
Best single flight UA 3598 ORD 17:50 → SDF 20:23 · 77% on time Avoid AA 4603 ORD 19:29 → SDF 22:04 · 75% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
ORD
85
91
92
79
77
87
70
76
76
79
79
78
70
83
% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55
Louisville flights leaving ORD 4–5 pm: 3Close ×
AA 4668flown by Republic ORD 16:02 SDF 18:36 1h 36m 70 86% 5.7% 79 min
UA 4519flown by GoJet ORD 16:25 SDF 18:56 1h 31m 37 66% 5.4% 48 min
UA 5228flown by SkyWest ORD 16:29 SDF 19:00 1h 31m 24 71% 12.5% 44 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
American (incl. Envoy, PSA, SkyWest, Republic) 1,313 80% 3.6% 75 min
United (incl. GoJet, SkyWest, Republic) 2,010 74% 3.7% 77 min

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.
UA 3598flown by Republic ORD 17:50 SDF 20:23 77%
AA 4603flown by Republic ORD 19:29 SDF 22:04 75%
All 14 flights on this route →

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
American ORD SDF 1h 31m 80% 3.6% 1,313 Flying now
United ORD SDF 1h 32m 74% 3.7% 2,010 Flying now
Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON