DL 875 then DL 2398 at Atlanta
Salt Lake City → Atlanta → New York JFK
Timetable, Atlanta time
21:25DL 875 from Salt Lake City at the gate
15:16DL 2398 to New York JFK leaves the gate
17 h 51 apart on the timetable, overnight
DL 2398 leaves 17 h 51 after DL 875 arrives on the timetable: more than half a day, so not a connection we count.