VA 8311 then VA 8118 at San Francisco
Boston → San Francisco → Las Vegas
Timetable, San Francisco time
12:09VA 8311 from Boston at the gate
08:35VA 8118 to Las Vegas leaves the gate
20 h 26 apart on the timetable, overnight
VA 8118 leaves 20 h 26 after VA 8311 arrives on the timetable: more than half a day, so not a connection we count.