AA 1921 then AA 1594 at Phoenix
Las Vegas → Phoenix → Austin
Timetable, Phoenix time
16:22AA 1921 from Las Vegas at the gate
13:58AA 1594 to Austin leaves the gate
21 h 36 apart on the timetable, overnight
AA 1594 leaves 21 h 36 after AA 1921 arrives on the timetable: more than half a day, so not a connection we count.