UA 2611 then CA 3174 at O'Hare
Santa Ana → Chicago → Guangzhou
Timetable, Chicago time
20:33UA 2611 from Santa Ana at the gate
17:25CA 3174 to Guangzhou leaves the gate
20 h 52 apart on the timetable, overnight
CA 3174 leaves 20 h 52 after UA 2611 arrives on the timetable: more than half a day, so not a connection we count.