AA 4576 then DL 2718 at Atlanta
Washington National → Atlanta → Gulfport
Timetable, Atlanta time
13:03AA 4576 from Washington National at the gate
12:43DL 2718 to Gulfport leaves the gate
23 h 40 apart on the timetable, overnight
DL 2718 leaves 23 h 40 after AA 4576 arrives on the timetable: more than half a day, so not a connection we count.