AA 712 then AA 377 at JFK
Miami → New York → Charlotte
Timetable, New York time
11:00AA 712 from Miami at the gate
15:26AA 377 to Charlotte leaves the gate
4 h 26 apart on the timetable
The last days
AA 712 and AA 377 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.