AA 1673 then AA 4712 at Detroit
Phoenix → Detroit → Washington National
Timetable, Detroit time
16:55AA 1673 from Phoenix at the gate
16:46AA 4712 to Washington National leaves the gate
23 h 51 apart on the timetable, overnight
AA 4712 leaves 23 h 51 after AA 1673 arrives on the timetable: more than half a day, so not a connection we count.