AA 2711 then AA 3104 at Miami
Jacksonville → Miami → Charlotte
Timetable, Miami time
12:54AA 2711 from Jacksonville at the gate
13:40AA 3104 to Charlotte leaves the gate
46 min apart on the timetable
The last days
AA 2711 and AA 3104 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.