DL 1390 then CA 3174 at O'Hare
New York LaGuardia → Chicago → Guangzhou
Timetable, Chicago time
18:22DL 1390 from New York LaGuardia at the gate
13:40CA 3174 to Guangzhou leaves the gate
19 h 18 apart on the timetable, overnight
CA 3174 leaves 19 h 18 after DL 1390 arrives on the timetable: more than half a day, so not a connection we count.