TK 9588 then UA 648 at San Francisco
Portland (Oregon) → San Francisco → Las Vegas
Timetable, San Francisco time
15:15TK 9588 from Portland (Oregon) at the gate
12:28UA 648 to Las Vegas leaves the gatealso AC 4078, VA 8120, NZ 9228
21 h 13 apart on the timetable, overnight
UA 648 leaves 21 h 13 after TK 9588 arrives on the timetable: more than half a day, so not a connection we count.