AA 3673 then CZ 438 at O'Hare
Omaha → Chicago → Shanghai
Timetable, Chicago time
10:30AA 3673 from Omaha at the gate
01:45CZ 438 to Shanghai leaves the gate
15 h 15 apart on the timetable, overnight
CZ 438 leaves 15 h 15 after AA 3673 arrives on the timetable: more than half a day, so not a connection we count.