UA 643 then WN 3847 at San Francisco
Las Vegas → San Francisco → Los Angeles
Timetable, San Francisco time
07:44UA 643 from Las Vegas at the gatealso AC 5211, NH 7315, VA 8122, NZ 9237
07:00WN 3847 to Los Angeles leaves the gate
23 h 16 apart on the timetable, overnight
WN 3847 leaves 23 h 16 after UA 643 arrives on the timetable: more than half a day, so not a connection we count.