DL 2398 then B6 477 at JFK
Atlanta → New York → Jacksonville
Timetable, New York time
17:36DL 2398 from Atlanta at the gate
11:59B6 477 to Jacksonville leaves the gate
18 h 23 apart on the timetable, overnight
B6 477 leaves 18 h 23 after DL 2398 arrives on the timetable: more than half a day, so not a connection we count.