AA 1212 then AA 1414 at Phoenix
San Diego → Phoenix → Denver
Timetable, Phoenix time
07:49AA 1212 from San Diego at the gate
08:40AA 1414 to Denver leaves the gate
51 min apart on the timetable
The last days
AA 1212 and AA 1414 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.