TK 9588 then QR 738 at San Francisco
Portland (Oregon) → San Francisco → Doha
Timetable, San Francisco time
15:15TK 9588 from Portland (Oregon) at the gate
15:00QR 738 to Doha leaves the gate
23 h 45 apart on the timetable, overnight
QR 738 leaves 23 h 45 after TK 9588 arrives on the timetable: more than half a day, so not a connection we count.