TK 9588 then CA 986 at San Francisco
Portland (Oregon) → San Francisco → Beijing
Timetable, San Francisco time
15:15TK 9588 from Portland (Oregon) at the gate
12:00CA 986 to Beijing leaves the gate
20 h 45 apart on the timetable, overnight
CA 986 leaves 20 h 45 after TK 9588 arrives on the timetable: more than half a day, so not a connection we count.