DL 2345 then DL 2398 at Atlanta
Fort Lauderdale → Atlanta → New York JFK
Timetable, Atlanta time
20:40DL 2345 from Fort Lauderdale at the gate
15:16DL 2398 to New York JFK leaves the gate
18 h 36 apart on the timetable, overnight
DL 2398 leaves 18 h 36 after DL 2345 arrives on the timetable: more than half a day, so not a connection we count.