DL 1147 then AA 492 at O'Hare
Atlanta → Chicago → Cancún
Timetable, Chicago time
10:25DL 1147 from Atlanta at the gate
10:05AA 492 to Cancún leaves the gate
23 h 40 apart on the timetable, overnight
AA 492 leaves 23 h 40 after DL 1147 arrives on the timetable: more than half a day, so not a connection we count.