B6 372 then DL 5459 at JFK
Salt Lake City → New York → Savannah
Timetable, New York time
06:30B6 372 from Salt Lake City at the gate
18:40DL 5459 to Savannah leaves the gate
12 h 10 apart on the timetable
DL 5459 leaves 12 h 10 after B6 372 arrives on the timetable: more than half a day, so not a connection we count.