TK 9588 then UA 2386 at San Francisco
Portland (Oregon) → San Francisco → Washington National
Timetable, San Francisco time
15:15TK 9588 from Portland (Oregon) at the gate
14:18UA 2386 to Washington National leaves the gatealso NZ 2777
23 h 03 apart on the timetable, overnight
UA 2386 leaves 23 h 03 after TK 9588 arrives on the timetable: more than half a day, so not a connection we count.