AA 1368 then DL 434 at Atlanta
Miami → Atlanta → New York LaGuardia
Timetable, Atlanta time
18:04AA 1368 from Miami at the gate
18:00DL 434 to New York LaGuardia leaves the gate
23 h 56 apart on the timetable, overnight
DL 434 leaves 23 h 56 after AA 1368 arrives on the timetable: more than half a day, so not a connection we count.