AA 5585 then UA 3671 at Charlotte
Louisville → Charlotte → Chicago O'Hare
Timetable, Charlotte time
19:21AA 5585 from Louisville at the gate
15:30UA 3671 to Chicago O'Hare leaves the gate
20 h 09 apart on the timetable, overnight
UA 3671 leaves 20 h 09 after AA 5585 arrives on the timetable: more than half a day, so not a connection we count.