AA 1999 then AS 2088 at Phoenix
Boston → Phoenix → San Diego
Timetable, Phoenix time
19:49AA 1999 from Boston at the gate
20:22AS 2088 to San Diego leaves the gate
33 min apart on the timetable
The last days
AA 1999 and AS 2088 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.