AA 4396 then B6 477 at JFK
Washington National → New York → Jacksonville
Timetable, New York time
07:27AA 4396 from Washington National at the gate
06:55B6 477 to Jacksonville leaves the gate
23 h 28 apart on the timetable, overnight
B6 477 leaves 23 h 28 after AA 4396 arrives on the timetable: more than half a day, so not a connection we count.