DL 776 then AR 1305 at Miami
Boston → Miami → Buenos Aires
Timetable, Miami time
19:36DL 776 from Boston at the gate
17:25AR 1305 to Buenos Aires leaves the gate
21 h 49 apart on the timetable, overnight
AR 1305 leaves 21 h 49 after DL 776 arrives on the timetable: more than half a day, so not a connection we count.