QR 31 then AA 492 at O'Hare
Milan → Chicago → Cancún
Timetable, Chicago time
11:14QR 31 from Milan at the gate
10:05AA 492 to Cancún leaves the gate
22 h 51 apart on the timetable, overnight
AA 492 leaves 22 h 51 after QR 31 arrives on the timetable: more than half a day, so not a connection we count.