AA 2461 then QR 76 at O'Hare
Boston → Chicago → Milan
Timetable, Chicago time
20:12AA 2461 from Boston at the gate
14:45QR 76 to Milan leaves the gate
18 h 33 apart on the timetable, overnight
QR 76 leaves 18 h 33 after AA 2461 arrives on the timetable: more than half a day, so not a connection we count.