AA 1204 then AA 5129 at Charlotte
Buffalo → Charlotte → Nashville
Timetable, Charlotte time
07:50AA 1204 from Buffalo at the gate
11:53AA 5129 to Nashville leaves the gate
4 h 03 apart on the timetable
The last days
AA 1204 and AA 5129 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.