AA 2112 then QR 76 at O'Hare
Seattle (SEA) → Chicago → Milan
Timetable, Chicago time
16:58AA 2112 from Seattle (SEA) at the gate
14:45QR 76 to Milan leaves the gate
21 h 47 apart on the timetable, overnight
QR 76 leaves 21 h 47 after AA 2112 arrives on the timetable: more than half a day, so not a connection we count.