AA 2361 then UA 4772 at O'Hare
Atlanta → Chicago → Columbia Regional
Timetable, Chicago time
14:15AA 2361 from Atlanta at the gate
12:45UA 4772 to Columbia Regional leaves the gate
22 h 30 apart on the timetable, overnight
UA 4772 leaves 22 h 30 after AA 2361 arrives on the timetable: more than half a day, so not a connection we count.