DL 1510 then AA 4460 at Atlanta
Miami → Atlanta → New York LaGuardia
Timetable, Atlanta time
14:55DL 1510 from Miami at the gate
14:49AA 4460 to New York LaGuardia leaves the gate
23 h 54 apart on the timetable, overnight
AA 4460 leaves 23 h 54 after DL 1510 arrives on the timetable: more than half a day, so not a connection we count.