DL 2879 then CA 3174 at O'Hare
Atlanta → Chicago → Guangzhou
Timetable, Chicago time
19:05DL 2879 from Atlanta at the gate
13:40CA 3174 to Guangzhou leaves the gate
18 h 35 apart on the timetable, overnight
CA 3174 leaves 18 h 35 after DL 2879 arrives on the timetable: more than half a day, so not a connection we count.