UA 1597 then CA 3174 at O'Hare
Salt Lake City → Chicago → Guangzhou
Timetable, Chicago time
20:43UA 1597 from Salt Lake City at the gate
13:40CA 3174 to Guangzhou leaves the gate
16 h 57 apart on the timetable, overnight
CA 3174 leaves 16 h 57 after UA 1597 arrives on the timetable: more than half a day, so not a connection we count.