AA 3580 then K4 221 at O'Hare
Louisville → Chicago → Cincinnati Northern Kentucky
Timetable, Chicago time
13:30AA 3580 from Louisville at the gate
10:35K4 221 to Cincinnati Northern Kentucky leaves the gate
21 h 05 apart on the timetable, overnight
K4 221 leaves 21 h 05 after AA 3580 arrives on the timetable: more than half a day, so not a connection we count.