AA 2612 then QR 76 at O'Hare
Houston → Chicago → Milan
Timetable, Chicago time
20:10AA 2612 from Houston at the gate
14:45QR 76 to Milan leaves the gate
18 h 35 apart on the timetable, overnight
QR 76 leaves 18 h 35 after AA 2612 arrives on the timetable: more than half a day, so not a connection we count.