UA 2058 then UA 406 at San Francisco
Phoenix → San Francisco → Las Vegas
Timetable, San Francisco time
07:17UA 2058 from Phoenix at the gatealso VA 8582, NZ 9385
21:10UA 406 to Las Vegas leaves the gatealso AC 4025, VA 8562, NZ 9229
13 h 53 apart on the timetable
UA 406 leaves 13 h 53 after UA 2058 arrives on the timetable: more than half a day, so not a connection we count.