AA 5510 then DL 842 at Atlanta
Washington National → Atlanta → Phoenix
Timetable, Atlanta time
23:23AA 5510 from Washington National at the gate
21:15DL 842 to Phoenix leaves the gate
21 h 52 apart on the timetable, overnight
DL 842 leaves 21 h 52 after AA 5510 arrives on the timetable: more than half a day, so not a connection we count.