UA 1237 then CK 226 at O'Hare
Minneapolis → Chicago → Shanghai
Timetable, Chicago time
20:27UA 1237 from Minneapolis at the gate
09:15CK 226 to Shanghai leaves the gate
12 h 48 apart on the timetable, overnight
CK 226 leaves 12 h 48 after UA 1237 arrives on the timetable: more than half a day, so not a connection we count.