AA 5510 then DL 3178 at Atlanta
Washington National → Atlanta → Gulfport
Timetable, Atlanta time
23:23AA 5510 from Washington National at the gate
21:29DL 3178 to Gulfport leaves the gate
22 h 06 apart on the timetable, overnight
DL 3178 leaves 22 h 06 after AA 5510 arrives on the timetable: more than half a day, so not a connection we count.