AS 2184 then AA 1594 at Phoenix
Boise → Phoenix → Austin
Timetable, Phoenix time
19:04AS 2184 from Boise at the gate
13:58AA 1594 to Austin leaves the gate
18 h 54 apart on the timetable, overnight
AA 1594 leaves 18 h 54 after AS 2184 arrives on the timetable: more than half a day, so not a connection we count.