AA 2891 then DL 9960 at Atlanta
Miami → Atlanta → New York LaGuardia
Timetable, Atlanta time
09:47AA 2891 from Miami at the gate
06:00DL 9960 to New York LaGuardia leaves the gate
20 h 13 apart on the timetable, overnight
DL 9960 leaves 20 h 13 after AA 2891 arrives on the timetable: more than half a day, so not a connection we count.