AA 1554 then AA 5601 at Charlotte
Jacksonville → Charlotte → Nashville
Timetable, Charlotte time
11:20AA 1554 from Jacksonville at the gate
17:57AA 5601 to Nashville leaves the gate
6 h 37 apart on the timetable
The last days
AA 1554 and AA 5601 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.