DL 2923 then DL 2386 at Atlanta
Jacksonville → Atlanta → New York JFK
Timetable, Atlanta time
14:05DL 2923 from Jacksonville at the gate
03:11DL 2386 to New York JFK leaves the gate
13 h 06 apart on the timetable, overnight
DL 2386 leaves 13 h 06 after DL 2923 arrives on the timetable: more than half a day, so not a connection we count.