UA 1623 then UA 406 at San Francisco
Sacramento → San Francisco → Las Vegas
Timetable, San Francisco time
07:15UA 1623 from Sacramento at the gate
21:10UA 406 to Las Vegas leaves the gatealso AC 4025, VA 8562, LH 8940, NZ 9229
13 h 55 apart on the timetable
UA 406 leaves 13 h 55 after UA 1623 arrives on the timetable: more than half a day, so not a connection we count.