AA 6596 then AA 5509 at Philadelphia
Trenton → Philadelphia → Austin
Timetable, Philadelphia time
07:40AA 6596 from Trenton at the gate
11:00AA 5509 to Austin leaves the gate
3 h 20 apart on the timetable
The last days
AA 6596 and AA 5509 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.