AA 6131 then AA 3216 at Philadelphia
Buffalo → Philadelphia → Atlanta
Timetable, Philadelphia time
08:29AA 6131 from Buffalo at the gate
15:28AA 3216 to Atlanta leaves the gate
6 h 59 apart on the timetable
The last days
AA 6131 and AA 3216 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.