VA 8311 then UA 1845 at San Francisco
Boston → San Francisco → Reno
Timetable, San Francisco time
12:09VA 8311 from Boston at the gate
12:06UA 1845 to Reno leaves the gate
23 h 57 apart on the timetable, overnight
UA 1845 leaves 23 h 57 after VA 8311 arrives on the timetable: more than half a day, so not a connection we count.