DL 2513 then CA 3174 at O'Hare
New York LaGuardia → Chicago → Guangzhou
Timetable, Chicago time
20:45DL 2513 from New York LaGuardia at the gate
13:40CA 3174 to Guangzhou leaves the gate
16 h 55 apart on the timetable, overnight
CA 3174 leaves 16 h 55 after DL 2513 arrives on the timetable: more than half a day, so not a connection we count.