DL 1805 then DL 2398 at Atlanta
La Mesa → Atlanta → New York JFK
Timetable, Atlanta time
17:43DL 1805 from La Mesa at the gate
15:16DL 2398 to New York JFK leaves the gate
21 h 33 apart on the timetable, overnight
DL 2398 leaves 21 h 33 after DL 1805 arrives on the timetable: more than half a day, so not a connection we count.