UA 3852 then AS 68 at San Francisco
Seoul → San Francisco → Seattle
Timetable, San Francisco time
08:46UA 3852 from Seoul at the gate
06:08AS 68 to Seattle leaves the gatealso AA 7530
21 h 22 apart on the timetable, overnight
AS 68 leaves 21 h 22 after UA 3852 arrives on the timetable: more than half a day, so not a connection we count.