AA 3300 then CZ 2502 at O'Hare
Denver → Chicago → Shanghai
Timetable, Chicago time
11:45AA 3300 from Denver at the gate
01:45CZ 2502 to Shanghai leaves the gate
14 h apart on the timetable, overnight
CZ 2502 leaves 14 h after AA 3300 arrives on the timetable: more than half a day, so not a connection we count.