B6 778 then DL 1410 at Boston
Las Vegas → Boston → Austin
Timetable, Boston time
06:25B6 778 from Las Vegas at the gate
06:15DL 1410 to Austin leaves the gate
23 h 50 apart on the timetable, overnight
DL 1410 leaves 23 h 50 after B6 778 arrives on the timetable: more than half a day, so not a connection we count.