DL 2804 then CK 626 at O'Hare
Boston → Chicago → Shanghai
Timetable, Chicago time
22:36DL 2804 from Boston at the gate
19:32CK 626 to Shanghai leaves the gate
20 h 56 apart on the timetable, overnight
CK 626 leaves 20 h 56 after DL 2804 arrives on the timetable: more than half a day, so not a connection we count.