TK 9588 then AC 4470 at San Francisco
Portland (Oregon) → San Francisco → Ontario
Timetable, San Francisco time
15:15TK 9588 from Portland (Oregon) at the gate
14:00AC 4470 to Ontario leaves the gatealso UA 5592
22 h 45 apart on the timetable, overnight
AC 4470 leaves 22 h 45 after TK 9588 arrives on the timetable: more than half a day, so not a connection we count.