UA 658 then CA 3174 at O'Hare
Minneapolis → Chicago → Guangzhou
Timetable, Chicago time
18:30UA 658 from Minneapolis at the gate
13:40CA 3174 to Guangzhou leaves the gate
19 h 10 apart on the timetable, overnight
CA 3174 leaves 19 h 10 after UA 658 arrives on the timetable: more than half a day, so not a connection we count.