AA 1984 then UA 1885 at Phoenix
Philadelphia → Phoenix → San Diego
Timetable, Phoenix time
19:51AA 1984 from Philadelphia at the gate
20:39UA 1885 to San Diego leaves the gate
48 min apart on the timetable
The last days
AA 1984 and UA 1885 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.