UA 643 then QR 2005 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
20:08QR 2005 to Los Angeles leaves the gate
12 h 24 apart on the timetable
QR 2005 leaves 12 h 24 after UA 643 arrives on the timetable: more than half a day, so not a connection we count.