AA 1983 then DL 3535 at Phoenix
Miami → Phoenix → Austin
Timetable, Phoenix time
09:35AA 1983 from Miami at the gate
10:34DL 3535 to Austin leaves the gate
59 min apart on the timetable
The last days
AA 1983 and DL 3535 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.