AA 4915 then CA 3174 at O'Hare
Lexington → Chicago → Guangzhou
Timetable, Chicago time
19:59AA 4915 from Lexington at the gate
13:40CA 3174 to Guangzhou leaves the gate
17 h 41 apart on the timetable, overnight
CA 3174 leaves 17 h 41 after AA 4915 arrives on the timetable: more than half a day, so not a connection we count.