DL 836 then AA 1594 at Phoenix
Atlanta → Phoenix → Austin
Timetable, Phoenix time
18:35DL 836 from Atlanta at the gate
13:58AA 1594 to Austin leaves the gate
19 h 23 apart on the timetable, overnight
AA 1594 leaves 19 h 23 after DL 836 arrives on the timetable: more than half a day, so not a connection we count.