JX 12 then UA 552 at San Francisco
Taipei → San Francisco → Redmond
Timetable, San Francisco time
19:10JX 12 from Taipei at the gatealso AS 7218, AA 8366
16:40UA 552 to Redmond leaves the gate
21 h 30 apart on the timetable, overnight
UA 552 leaves 21 h 30 after JX 12 arrives on the timetable: more than half a day, so not a connection we count.