QR 8154 then AA 90 at O'Hare
Milan → Chicago → London
Timetable, Chicago time
07:50QR 8154 from Milan at the gate
20:30AA 90 to London leaves the gate
12 h 40 apart on the timetable
AA 90 leaves 12 h 40 after QR 8154 arrives on the timetable: more than half a day, so not a connection we count.