AA 6486 then AA 3785 at O'Hare
Detroit → Chicago → Allentown
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
14:35AA 3785 to Allentown leaves the gate
21 h 06 apart on the timetable, overnight
AA 3785 leaves 21 h 06 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.