DL 686 then DL 9960 at Atlanta
Savannah → Atlanta → New York LaGuardia
Timetable, Atlanta time
09:33DL 686 from Savannah at the gate
06:00DL 9960 to New York LaGuardia leaves the gate
20 h 27 apart on the timetable, overnight
DL 9960 leaves 20 h 27 after DL 686 arrives on the timetable: more than half a day, so not a connection we count.