DL 591 then DL 2398 at Atlanta
Las Vegas → Atlanta → New York JFK
Timetable, Atlanta time
22:00DL 591 from Las Vegas at the gate
15:16DL 2398 to New York JFK leaves the gate
17 h 16 apart on the timetable, overnight
DL 2398 leaves 17 h 16 after DL 591 arrives on the timetable: more than half a day, so not a connection we count.