AA 2474 then UA 4772 at O'Hare
Phoenix → Chicago → Columbia Regional
Timetable, Chicago time
14:33AA 2474 from Phoenix at the gate
12:45UA 4772 to Columbia Regional leaves the gate
22 h 12 apart on the timetable, overnight
UA 4772 leaves 22 h 12 after AA 2474 arrives on the timetable: more than half a day, so not a connection we count.