AA 41 then CZ 2502 at O'Hare
Barcelona → Chicago → Shanghai
Timetable, Chicago time
14:05AA 41 from Barcelona at the gate
13:55CZ 2502 to Shanghai leaves the gate
23 h 50 apart on the timetable, overnight
CZ 2502 leaves 23 h 50 after AA 41 arrives on the timetable: more than half a day, so not a connection we count.