DL 599 then DL 2398 at Atlanta
Mexico City → Atlanta → New York JFK
Timetable, Atlanta time
20:56DL 599 from Mexico City at the gate
15:16DL 2398 to New York JFK leaves the gate
18 h 20 apart on the timetable, overnight
DL 2398 leaves 18 h 20 after DL 599 arrives on the timetable: more than half a day, so not a connection we count.