AA 3965 then AA 3129 at Charlotte
Greensboro → Charlotte → Jacksonville
Timetable, Charlotte time
08:20AA 3965 from Greensboro at the gate
15:02AA 3129 to Jacksonville leaves the gate
6 h 42 apart on the timetable
The last days
AA 3965 and AA 3129 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.