B6 6558 then DL 5483 at JFK
Doha → New York → Jacksonville
Timetable, New York time
08:00B6 6558 from Doha at the gate
07:15DL 5483 to Jacksonville leaves the gate
23 h 15 apart on the timetable, overnight
DL 5483 leaves 23 h 15 after B6 6558 arrives on the timetable: more than half a day, so not a connection we count.