AA 4104 then AA 6199 at Phoenix
Denver → Phoenix → San Diego
Timetable, Phoenix time
16:50AA 4104 from Denver at the gate
17:44AA 6199 to San Diego leaves the gate
54 min apart on the timetable
The last days
AA 4104 and AA 6199 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.