B6 478 then DL 1387 at JFK
Jacksonville → New York → New Orleans
Timetable, New York time
18:00B6 478 from Jacksonville at the gate
16:40DL 1387 to New Orleans leaves the gate
22 h 40 apart on the timetable, overnight
DL 1387 leaves 22 h 40 after B6 478 arrives on the timetable: more than half a day, so not a connection we count.