DL 366 then AA 1594 at Phoenix
Atlanta → Phoenix → Austin
Timetable, Phoenix time
15:22DL 366 from Atlanta at the gate
13:58AA 1594 to Austin leaves the gate
22 h 36 apart on the timetable, overnight
AA 1594 leaves 22 h 36 after DL 366 arrives on the timetable: more than half a day, so not a connection we count.