UA 2160 then CA 3174 at O'Hare
Dallas-Fort Worth → Chicago → Guangzhou
Timetable, Chicago time
17:00UA 2160 from Dallas-Fort Worth at the gate
13:40CA 3174 to Guangzhou leaves the gate
20 h 40 apart on the timetable, overnight
CA 3174 leaves 20 h 40 after UA 2160 arrives on the timetable: more than half a day, so not a connection we count.