UA 5735 then CA 1020 at O'Hare
Omaha → Chicago → Shanghai
Timetable, Chicago time
08:02UA 5735 from Omaha at the gate
03:55CA 1020 to Shanghai leaves the gate
19 h 53 apart on the timetable, overnight
CA 1020 leaves 19 h 53 after UA 5735 arrives on the timetable: more than half a day, so not a connection we count.