AA 2982 then AA 1594 at Phoenix
Miami → Phoenix → Austin
Timetable, Phoenix time
19:39AA 2982 from Miami at the gate
13:58AA 1594 to Austin leaves the gate
18 h 19 apart on the timetable, overnight
AA 1594 leaves 18 h 19 after AA 2982 arrives on the timetable: more than half a day, so not a connection we count.