UA 747 then QR 76 at O'Hare
Seattle (SEA) → Chicago → Milan
Timetable, Chicago time
16:59UA 747 from Seattle (SEA) at the gate
14:45QR 76 to Milan leaves the gate
21 h 46 apart on the timetable, overnight
QR 76 leaves 21 h 46 after UA 747 arrives on the timetable: more than half a day, so not a connection we count.