B6 724 then DL 5702 at Boston
Santiago (Dominican Republic) → Boston → New York JFK
Timetable, Boston time
08:59B6 724 from Santiago (Dominican Republic) at the gate
21:20DL 5702 to New York JFK leaves the gate
12 h 21 apart on the timetable
DL 5702 leaves 12 h 21 after B6 724 arrives on the timetable: more than half a day, so not a connection we count.