AA 6486 then AA 492 at O'Hare
Detroit → Chicago → Cancún
Timetable, Chicago time
17:29AA 6486 from Detroit at the gate
10:05AA 492 to Cancún leaves the gate
16 h 36 apart on the timetable, overnight
AA 492 leaves 16 h 36 after AA 6486 arrives on the timetable: more than half a day, so not a connection we count.