UA 892 then QR 2091 at San Francisco
Seoul → San Francisco → Santa Ana
Timetable, San Francisco time
11:45UA 892 from Seoul at the gatealso OZ 6614
09:00QR 2091 to Santa Ana leaves the gate
21 h 15 apart on the timetable, overnight
QR 2091 leaves 21 h 15 after UA 892 arrives on the timetable: more than half a day, so not a connection we count.