AA 2570 then CA 3174 at O'Hare
Salt Lake City → Chicago → Guangzhou
Timetable, Chicago time
21:55AA 2570 from Salt Lake City at the gate
13:40CA 3174 to Guangzhou leaves the gate
15 h 45 apart on the timetable, overnight
CA 3174 leaves 15 h 45 after AA 2570 arrives on the timetable: more than half a day, so not a connection we count.