AA 508 then AA 2731 at Philadelphia
San Juan → Philadelphia → Pittsburgh
Timetable, Philadelphia time
11:40AA 508 from San Juan at the gate
15:37AA 2731 to Pittsburgh leaves the gate
3 h 57 apart on the timetable
The last days
AA 508 and AA 2731 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.