TK 9588 then KE 3471 at San Francisco
Portland (Oregon) → San Francisco → Detroit
Timetable, San Francisco time
15:15TK 9588 from Portland (Oregon) at the gate
11:40KE 3471 to Detroit leaves the gate
20 h 25 apart on the timetable, overnight
KE 3471 leaves 20 h 25 after TK 9588 arrives on the timetable: more than half a day, so not a connection we count.