AA 3250 then CZ 438 at O'Hare
San Francisco → Chicago → Shanghai
Timetable, Chicago time
13:44AA 3250 from San Francisco at the gate
01:45CZ 438 to Shanghai leaves the gate
12 h 01 apart on the timetable, overnight
CZ 438 leaves 12 h 01 after AA 3250 arrives on the timetable: more than half a day, so not a connection we count.