AA 978 then DL 8939 at Phoenix
Mazatlan → Phoenix → San Diego
Timetable, Phoenix time
10:32AA 978 from Mazatlan at the gate
14:00DL 8939 to San Diego leaves the gate
3 h 28 apart on the timetable
The last days
AA 978 and DL 8939 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.