F9 2387 then AA 2255 at Charlotte
Philadelphia → Charlotte → Pittsburgh
Timetable, Charlotte time
10:40F9 2387 from Philadelphia at the gate
08:55AA 2255 to Pittsburgh leaves the gate
22 h 15 apart on the timetable, overnight
AA 2255 leaves 22 h 15 after F9 2387 arrives on the timetable: more than half a day, so not a connection we count.