UA 1349 then CA 1016 at O'Hare
Boston → Chicago → Shanghai
Timetable, Chicago time
11:15UA 1349 from Boston at the gate
23:30CA 1016 to Shanghai leaves the gate
12 h 15 apart on the timetable
CA 1016 leaves 12 h 15 after UA 1349 arrives on the timetable: more than half a day, so not a connection we count.