AA 2421 then QR 76 at O'Hare
Dallas-Fort Worth → Chicago → Milan
Timetable, Chicago time
16:00AA 2421 from Dallas-Fort Worth at the gate
14:45QR 76 to Milan leaves the gate
22 h 45 apart on the timetable, overnight
QR 76 leaves 22 h 45 after AA 2421 arrives on the timetable: more than half a day, so not a connection we count.