AA 1659 then AA 1715 at Charlotte
Buffalo → Charlotte → Pittsburgh
Timetable, Charlotte time
09:09AA 1659 from Buffalo at the gate
15:53AA 1715 to Pittsburgh leaves the gate
6 h 44 apart on the timetable
The last days
AA 1659 and AA 1715 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.