AA 5801 then AA 3216 at Philadelphia
Harrisburg → Philadelphia → Atlanta
Timetable, Philadelphia time
15:52AA 5801 from Harrisburg at the gate
15:28AA 3216 to Atlanta leaves the gate
23 h 36 apart on the timetable, overnight
AA 3216 leaves 23 h 36 after AA 5801 arrives on the timetable: more than half a day, so not a connection we count.