AA 1428 then UA 1748 at Phoenix
DES → Phoenix → Chicago O'Hare
Timetable, Phoenix time
10:29AA 1428 from DES at the gate
09:55UA 1748 to Chicago O'Hare leaves the gate
23 h 26 apart on the timetable, overnight
UA 1748 leaves 23 h 26 after AA 1428 arrives on the timetable: more than half a day, so not a connection we count.