AA 3903 then AA 1594 at Phoenix
Yuma → Phoenix → Austin
Timetable, Phoenix time
21:14AA 3903 from Yuma at the gate
13:58AA 1594 to Austin leaves the gate
16 h 44 apart on the timetable, overnight
AA 1594 leaves 16 h 44 after AA 3903 arrives on the timetable: more than half a day, so not a connection we count.