AA 2735 then CA 3174 at O'Hare
Sacramento → Chicago → Guangzhou
Timetable, Chicago time
20:30AA 2735 from Sacramento at the gate
13:40CA 3174 to Guangzhou leaves the gate
17 h 10 apart on the timetable, overnight
CA 3174 leaves 17 h 10 after AA 2735 arrives on the timetable: more than half a day, so not a connection we count.