AA 1428 then AA 789 at Phoenix
DES → Phoenix → Washington National
Timetable, Phoenix time
10:29AA 1428 from DES at the gate
09:47AA 789 to Washington National leaves the gate
23 h 18 apart on the timetable, overnight
AA 789 leaves 23 h 18 after AA 1428 arrives on the timetable: more than half a day, so not a connection we count.