AA 3012 then KJ 248 at O'Hare
Pittsburgh → Chicago → Atlanta
Timetable, Chicago time
21:29AA 3012 from Pittsburgh at the gate
11:35KJ 248 to Atlanta leaves the gate
14 h 06 apart on the timetable, overnight
KJ 248 leaves 14 h 06 after AA 3012 arrives on the timetable: more than half a day, so not a connection we count.