UA 602 then QR 76 at O'Hare
Miami → Chicago → Milan
Timetable, Chicago time
19:50UA 602 from Miami at the gate
14:45QR 76 to Milan leaves the gate
18 h 55 apart on the timetable, overnight
QR 76 leaves 18 h 55 after UA 602 arrives on the timetable: more than half a day, so not a connection we count.