TK 9588 then UA 1387 at San Francisco
Portland (Oregon) → San Francisco → Houston
Timetable, San Francisco time
15:15TK 9588 from Portland (Oregon) at the gate
12:00UA 1387 to Houston leaves the gatealso EK 6417
20 h 45 apart on the timetable, overnight
UA 1387 leaves 20 h 45 after TK 9588 arrives on the timetable: more than half a day, so not a connection we count.