AA 3588 then UA 4772 at O'Hare
Little Rock → Chicago → Columbia Regional
Timetable, Chicago time
14:23AA 3588 from Little Rock at the gate
12:45UA 4772 to Columbia Regional leaves the gate
22 h 22 apart on the timetable, overnight
UA 4772 leaves 22 h 22 after AA 3588 arrives on the timetable: more than half a day, so not a connection we count.