VA 8311 then UA 869 at San Francisco
Boston → San Francisco → Hong Kong
Timetable, San Francisco time
12:09VA 8311 from Boston at the gate
11:45UA 869 to Hong Kong leaves the gate
23 h 36 apart on the timetable, overnight
UA 869 leaves 23 h 36 after VA 8311 arrives on the timetable: more than half a day, so not a connection we count.