B6 2896 then B6 777 at Boston
Punta Cana → Boston → Las Vegas
Timetable, Boston time
21:59B6 2896 from Punta Cana at the gate
20:40B6 777 to Las Vegas leaves the gate
22 h 41 apart on the timetable, overnight
B6 777 leaves 22 h 41 after B6 2896 arrives on the timetable: more than half a day, so not a connection we count.