DL 2990 then DL 1328 at Atlanta
Jacksonville → Atlanta → Miami
Timetable, Atlanta time
17:25DL 2990 from Jacksonville at the gate
16:33DL 1328 to Miami leaves the gate
23 h 08 apart on the timetable, overnight
DL 1328 leaves 23 h 08 after DL 2990 arrives on the timetable: more than half a day, so not a connection we count.