AA 1252 then DL 2339 at Miami
Philadelphia → Miami → New York LaGuardia
Timetable, Miami time
08:59AA 1252 from Philadelphia at the gate
08:15DL 2339 to New York LaGuardia leaves the gate
23 h 16 apart on the timetable, overnight
DL 2339 leaves 23 h 16 after AA 1252 arrives on the timetable: more than half a day, so not a connection we count.