AA 1428 then UA 356 at Phoenix
DES → Phoenix → Atlanta
Timetable, Phoenix time
10:29AA 1428 from DES at the gate
07:50UA 356 to Atlanta leaves the gate
21 h 21 apart on the timetable, overnight
UA 356 leaves 21 h 21 after AA 1428 arrives on the timetable: more than half a day, so not a connection we count.