DL 1206 then DL 2398 at Atlanta
Milwaukee → Atlanta → New York JFK
Timetable, Atlanta time
21:53DL 1206 from Milwaukee at the gate
15:16DL 2398 to New York JFK leaves the gate
17 h 23 apart on the timetable, overnight
DL 2398 leaves 17 h 23 after DL 1206 arrives on the timetable: more than half a day, so not a connection we count.