DL 5318 then B6 477 at JFK
Rochester → New York → Jacksonville
Timetable, New York time
07:00DL 5318 from Rochester at the gate
06:55B6 477 to Jacksonville leaves the gate
23 h 55 apart on the timetable, overnight
B6 477 leaves 23 h 55 after DL 5318 arrives on the timetable: more than half a day, so not a connection we count.