NZ 9023 then VA 8562 at San Francisco
Boston → San Francisco → Las Vegas
Timetable, San Francisco time
12:09NZ 9023 from Boston at the gate
08:40VA 8562 to Las Vegas leaves the gate
20 h 31 apart on the timetable, overnight
VA 8562 leaves 20 h 31 after NZ 9023 arrives on the timetable: more than half a day, so not a connection we count.