AA 4356 then AA 1708 at Miami
Savannah → Miami → Newark
Timetable, Miami time
13:35AA 4356 from Savannah at the gate
14:34AA 1708 to Newark leaves the gate
59 min apart on the timetable
The last days
AA 4356 and AA 1708 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.