AA 1428 then UA 2766 at Phoenix
DES → Phoenix → Denver
Timetable, Phoenix time
10:29AA 1428 from DES at the gate
08:10UA 2766 to Denver leaves the gate
21 h 41 apart on the timetable, overnight
UA 2766 leaves 21 h 41 after AA 1428 arrives on the timetable: more than half a day, so not a connection we count.