UA 3901 then QR 2061 at San Francisco
Hong Kong → San Francisco → Santa Ana
Timetable, San Francisco time
16:34UA 3901 from Hong Kong at the gate
10:46QR 2061 to Santa Ana leaves the gatealso AS 3055, QR 3432
18 h 12 apart on the timetable, overnight
QR 2061 leaves 18 h 12 after UA 3901 arrives on the timetable: more than half a day, so not a connection we count.