UA 3901 then UA 2624 at San Francisco
Hong Kong → San Francisco → Portland (Oregon)
Timetable, San Francisco time
16:34UA 3901 from Hong Kong at the gate
10:27UA 2624 to Portland (Oregon) leaves the gatealso AC 3331, VA 8456, NZ 9343
17 h 53 apart on the timetable, overnight
UA 2624 leaves 17 h 53 after UA 3901 arrives on the timetable: more than half a day, so not a connection we count.