B6 778 then DL 1677 at Boston
Las Vegas → Boston → Austin
Timetable, Boston time
05:00B6 778 from Las Vegas at the gate
18:20DL 1677 to Austin leaves the gate
13 h 20 apart on the timetable
DL 1677 leaves 13 h 20 after B6 778 arrives on the timetable: more than half a day, so not a connection we count.