AA 4510 then CZ 428 at O'Hare
Des Moines → Chicago → Shanghai
Timetable, Chicago time
21:09AA 4510 from Des Moines at the gate
21:25CZ 428 to Shanghai leaves the gate
16 min apart on the timetable
The last days
AA 4510 and CZ 428 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.