TK 9588 then CZ 1634 at San Francisco
Portland (Oregon) → San Francisco → Chicago O'Hare
Timetable, San Francisco time
10:55TK 9588 from Portland (Oregon) at the gate
23:39CZ 1634 to Chicago O'Hare leaves the gate
12 h 44 apart on the timetable
CZ 1634 leaves 12 h 44 after TK 9588 arrives on the timetable: more than half a day, so not a connection we count.