AA 5510 then DL 1450 at Atlanta
Washington National → Atlanta → New Orleans
Timetable, Atlanta time
23:23AA 5510 from Washington National at the gate
19:59DL 1450 to New Orleans leaves the gate
20 h 36 apart on the timetable, overnight
DL 1450 leaves 20 h 36 after AA 5510 arrives on the timetable: more than half a day, so not a connection we count.