DL 518 then B6 1323 at Boston
Atlanta → Boston → Santiago (Dominican Republic)
Timetable, Boston time
19:07DL 518 from Atlanta at the gate
18:55B6 1323 to Santiago (Dominican Republic) leaves the gate
23 h 48 apart on the timetable, overnight
B6 1323 leaves 23 h 48 after DL 518 arrives on the timetable: more than half a day, so not a connection we count.