AA 9923 then DL 3719 at LAX
Tucson → Los Angeles → San Diego
Timetable, Los Angeles time
13:02AA 9923 from Tucson at the gate
14:15DL 3719 to San Diego leaves the gate
1 h 13 apart on the timetable
The last days
AA 9923 and DL 3719 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.