DL 3157 then DL 2398 at Atlanta
New Orleans → Atlanta → New York JFK
Timetable, Atlanta time
17:56DL 3157 from New Orleans at the gate
15:16DL 2398 to New York JFK leaves the gate
21 h 20 apart on the timetable, overnight
DL 2398 leaves 21 h 20 after DL 3157 arrives on the timetable: more than half a day, so not a connection we count.