DL 5775 then B6 1629 at Boston
Washington National → Boston → Santo Domingo
Timetable, Boston time
09:48DL 5775 from Washington National at the gate
22:00B6 1629 to Santo Domingo leaves the gate
12 h 12 apart on the timetable
B6 1629 leaves 12 h 12 after DL 5775 arrives on the timetable: more than half a day, so not a connection we count.