DL 1397 then DL 2398 at Atlanta
Austin → Atlanta → New York JFK
Timetable, Atlanta time
20:10DL 1397 from Austin at the gate
15:16DL 2398 to New York JFK leaves the gate
19 h 06 apart on the timetable, overnight
DL 2398 leaves 19 h 06 after DL 1397 arrives on the timetable: more than half a day, so not a connection we count.