AA 1838 then CA 3174 at O'Hare
Dallas-Fort Worth → Chicago → Guangzhou
Timetable, Chicago time
18:30AA 1838 from Dallas-Fort Worth at the gate
13:40CA 3174 to Guangzhou leaves the gate
19 h 10 apart on the timetable, overnight
CA 3174 leaves 19 h 10 after AA 1838 arrives on the timetable: more than half a day, so not a connection we count.