AA 3278 then AA 2412 at Philadelphia
Pittsburgh → Philadelphia → Tampa
Timetable, Philadelphia time
07:25AA 3278 from Pittsburgh at the gate
14:10AA 2412 to Tampa leaves the gate
6 h 45 apart on the timetable
The last days
AA 3278 and AA 2412 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.