AA 5510 then DL 2549 at Atlanta
Washington National → Atlanta → Washington
Timetable, Atlanta time
23:23AA 5510 from Washington National at the gate
22:55DL 2549 to Washington leaves the gate
23 h 32 apart on the timetable, overnight
DL 2549 leaves 23 h 32 after AA 5510 arrives on the timetable: more than half a day, so not a connection we count.