AA 709 then AA 6109 at Philadelphia
Jacksonville → Philadelphia → Harrisburg
Timetable, Philadelphia time
13:13AA 709 from Jacksonville at the gate
20:01AA 6109 to Harrisburg leaves the gate
6 h 48 apart on the timetable
The last days
AA 709 and AA 6109 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.