AA 3165 then UA 4772 at O'Hare
Phoenix → Chicago → Columbia Regional
Timetable, Chicago time
17:55AA 3165 from Phoenix at the gate
12:45UA 4772 to Columbia Regional leaves the gate
18 h 50 apart on the timetable, overnight
UA 4772 leaves 18 h 50 after AA 3165 arrives on the timetable: more than half a day, so not a connection we count.