AA 1652 then CZ 2502 at O'Hare
Philadelphia → Chicago → Shanghai
Timetable, Chicago time
07:27AA 1652 from Philadelphia at the gate
20:50CZ 2502 to Shanghai leaves the gate
13 h 23 apart on the timetable
CZ 2502 leaves 13 h 23 after AA 1652 arrives on the timetable: more than half a day, so not a connection we count.