AA 3733 then CZ 2504 at O'Hare
Kansas City → Chicago → Shanghai
Timetable, Chicago time
09:05AA 3733 from Kansas City at the gate
19:15CZ 2504 to Shanghai leaves the gate
10 h 10 apart on the timetable
The last days
AA 3733 and CZ 2504 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.