UA 5313 then UA 406 at San Francisco
Arcata → San Francisco → Las Vegas
Timetable, San Francisco time
07:33UA 5313 from Arcata at the gatealso NZ 9318
21:10UA 406 to Las Vegas leaves the gatealso AC 4025, VA 8562, LH 8940, NZ 9229
13 h 37 apart on the timetable
UA 406 leaves 13 h 37 after UA 5313 arrives on the timetable: more than half a day, so not a connection we count.