AA 3390 then AA 4502 at O'Hare
Greensboro → Chicago → Pittsburgh
Timetable, Chicago time
21:13AA 3390 from Greensboro at the gate
21:02AA 4502 to Pittsburgh leaves the gate
23 h 49 apart on the timetable, overnight
AA 4502 leaves 23 h 49 after AA 3390 arrives on the timetable: more than half a day, so not a connection we count.