AA 9955 then AA 5128 at Philadelphia
Savannah → Philadelphia → Nashville
Timetable, Philadelphia time
11:17AA 9955 from Savannah at the gate
14:16AA 5128 to Nashville leaves the gate
2 h 59 apart on the timetable
The last days
AA 9955 and AA 5128 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.