AA 1418 then DL 2339 at Miami
Boston → Miami → New York LaGuardia
Timetable, Miami time
08:27AA 1418 from Boston at the gate
08:15DL 2339 to New York LaGuardia leaves the gate
23 h 48 apart on the timetable, overnight
DL 2339 leaves 23 h 48 after AA 1418 arrives on the timetable: more than half a day, so not a connection we count.