DL 1189 then DL 2398 at Atlanta
Allentown → Atlanta → New York JFK
Timetable, Atlanta time
20:24DL 1189 from Allentown at the gate
15:16DL 2398 to New York JFK leaves the gate
18 h 52 apart on the timetable, overnight
DL 2398 leaves 18 h 52 after DL 1189 arrives on the timetable: more than half a day, so not a connection we count.