AA 490 then CZ 2502 at O'Hare
Philadelphia → Chicago → Shanghai
Timetable, Chicago time
22:30AA 490 from Philadelphia at the gate
13:55CZ 2502 to Shanghai leaves the gate
15 h 25 apart on the timetable, overnight
CZ 2502 leaves 15 h 25 after AA 490 arrives on the timetable: more than half a day, so not a connection we count.