AA 9909 then DL 8937 at Phoenix
Salt Lake City → Phoenix → San Diego
Timetable, Phoenix time
14:30AA 9909 from Salt Lake City at the gate
15:00DL 8937 to San Diego leaves the gate
30 min apart on the timetable
The last days
AA 9909 and DL 8937 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.