DL 2780 then DL 2398 at Atlanta
Dallas → Atlanta → New York JFK
Timetable, Atlanta time
21:59DL 2780 from Dallas at the gate
15:16DL 2398 to New York JFK leaves the gate
17 h 17 apart on the timetable, overnight
DL 2398 leaves 17 h 17 after DL 2780 arrives on the timetable: more than half a day, so not a connection we count.