DL 3155 then DL 896 at Atlanta
Gulfport → Atlanta → San Diego
Timetable, Atlanta time
08:55DL 3155 from Gulfport at the gate
21:48DL 896 to San Diego leaves the gate
12 h 53 apart on the timetable
DL 896 leaves 12 h 53 after DL 3155 arrives on the timetable: more than half a day, so not a connection we count.