AA 1591 then AA 570 at Phoenix
Ontario → Phoenix → San Diego
Timetable, Phoenix time
09:02AA 1591 from Ontario at the gate
12:25AA 570 to San Diego leaves the gate
3 h 23 apart on the timetable
The last days
AA 1591 and AA 570 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.