F9 2072 then AA 6580 at Philadelphia
Raleigh-Durham → Philadelphia → Allentown
Timetable, Philadelphia time
16:24F9 2072 from Raleigh-Durham at the gate
15:35AA 6580 to Allentown leaves the gate
23 h 11 apart on the timetable, overnight
AA 6580 leaves 23 h 11 after F9 2072 arrives on the timetable: more than half a day, so not a connection we count.