AA 2461 then CA 3174 at O'Hare
Boston → Chicago → Guangzhou
Timetable, Chicago time
20:12AA 2461 from Boston at the gate
13:40CA 3174 to Guangzhou leaves the gate
17 h 28 apart on the timetable, overnight
CA 3174 leaves 17 h 28 after AA 2461 arrives on the timetable: more than half a day, so not a connection we count.