AA 2925 then CA 8414 at O'Hare
Boston → Chicago → Shanghai
Timetable, Chicago time
21:54AA 2925 from Boston at the gate
20:45CA 8414 to Shanghai leaves the gate
22 h 51 apart on the timetable, overnight
CA 8414 leaves 22 h 51 after AA 2925 arrives on the timetable: more than half a day, so not a connection we count.