DL 406 then DL 2398 at Atlanta
Bozeman → Atlanta → New York JFK
Timetable, Atlanta time
20:12DL 406 from Bozeman at the gate
15:16DL 2398 to New York JFK leaves the gate
19 h 04 apart on the timetable, overnight
DL 2398 leaves 19 h 04 after DL 406 arrives on the timetable: more than half a day, so not a connection we count.