DL 1668 then DL 3178 at Atlanta
Indianapolis → Atlanta → Gulfport
Timetable, Atlanta time
22:00DL 1668 from Indianapolis at the gate
21:29DL 3178 to Gulfport leaves the gate
23 h 29 apart on the timetable, overnight
DL 3178 leaves 23 h 29 after DL 1668 arrives on the timetable: more than half a day, so not a connection we count.