B6 778 then B6 687 at Boston
Las Vegas → Boston → Los Angeles
Timetable, Boston time
06:32B6 778 from Las Vegas at the gate
06:00B6 687 to Los Angeles leaves the gate
23 h 28 apart on the timetable, overnight
B6 687 leaves 23 h 28 after B6 778 arrives on the timetable: more than half a day, so not a connection we count.