VN 98 then VA 8546 at San Francisco
Ho Chi Minh City → San Francisco → Los Angeles
Timetable, San Francisco time
17:00VN 98 from Ho Chi Minh City at the gate
05:50VA 8546 to Los Angeles leaves the gate
12 h 50 apart on the timetable, overnight
VA 8546 leaves 12 h 50 after VN 98 arrives on the timetable: more than half a day, so not a connection we count.