AA 3811 then QR 76 at O'Hare
Omaha → Chicago → Milan
Timetable, Chicago time
17:57AA 3811 from Omaha at the gate
14:45QR 76 to Milan leaves the gate
20 h 48 apart on the timetable, overnight
QR 76 leaves 20 h 48 after AA 3811 arrives on the timetable: more than half a day, so not a connection we count.