AA 6198 then CZ 2502 at O'Hare
Oklahoma City → Chicago → Shanghai
Timetable, Chicago time
09:30AA 6198 from Oklahoma City at the gate
01:45CZ 2502 to Shanghai leaves the gate
16 h 15 apart on the timetable, overnight
CZ 2502 leaves 16 h 15 after AA 6198 arrives on the timetable: more than half a day, so not a connection we count.