UA 563 then QR 76 at O'Hare
Boston → Chicago → Milan
Timetable, Chicago time
18:58UA 563 from Boston at the gate
14:45QR 76 to Milan leaves the gate
19 h 47 apart on the timetable, overnight
QR 76 leaves 19 h 47 after UA 563 arrives on the timetable: more than half a day, so not a connection we count.