AA 3958 then AA 2439 at Phoenix
Tucson → Phoenix → San Diego
Timetable, Phoenix time
14:47AA 3958 from Tucson at the gate
21:45AA 2439 to San Diego leaves the gate
6 h 58 apart on the timetable
The last days
AA 3958 and AA 2439 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.