AA 1250 then AA 2255 at Charlotte
St Louis → Charlotte → Pittsburgh
Timetable, Charlotte time
09:45AA 1250 from St Louis at the gate
08:55AA 2255 to Pittsburgh leaves the gate
23 h 10 apart on the timetable, overnight
AA 2255 leaves 23 h 10 after AA 1250 arrives on the timetable: more than half a day, so not a connection we count.