AA 990 then CA 1020 at O'Hare
Phoenix → Chicago → Shanghai
Timetable, Chicago time
11:39AA 990 from Phoenix at the gate
08:17CA 1020 to Shanghai leaves the gate
20 h 38 apart on the timetable, overnight
CA 1020 leaves 20 h 38 after AA 990 arrives on the timetable: more than half a day, so not a connection we count.