AA 2437 then AA 1331 at Charlotte
Pittsburgh → Charlotte → Washington National
Timetable, Charlotte time
06:39AA 2437 from Pittsburgh at the gate
20:25AA 1331 to Washington National leaves the gate
13 h 46 apart on the timetable
AA 1331 leaves 13 h 46 after AA 2437 arrives on the timetable: more than half a day, so not a connection we count.