DL 1987 then DL 2398 at Atlanta
Montego Bay → Atlanta → New York JFK
Timetable, Atlanta time
21:15DL 1987 from Montego Bay at the gate
15:16DL 2398 to New York JFK leaves the gate
18 h 01 apart on the timetable, overnight
DL 2398 leaves 18 h 01 after DL 1987 arrives on the timetable: more than half a day, so not a connection we count.