UA 1237 then CA 1020 at O'Hare
Minneapolis → Chicago → Shanghai
Timetable, Chicago time
20:21UA 1237 from Minneapolis at the gate
19:30CA 1020 to Shanghai leaves the gate
23 h 09 apart on the timetable, overnight
CA 1020 leaves 23 h 09 after UA 1237 arrives on the timetable: more than half a day, so not a connection we count.