B6 478 then AA 4463 at JFK
Jacksonville → New York → Washington National
Timetable, New York time
18:00B6 478 from Jacksonville at the gate
17:59AA 4463 to Washington National leaves the gate
23 h 59 apart on the timetable, overnight
AA 4463 leaves 23 h 59 after B6 478 arrives on the timetable: more than half a day, so not a connection we count.