UA 3852 then VS 1588 at San Francisco
Seoul → San Francisco → Minneapolis
Timetable, San Francisco time
08:46UA 3852 from Seoul at the gate
06:00VS 1588 to Minneapolis leaves the gatealso WS 6400
21 h 14 apart on the timetable, overnight
VS 1588 leaves 21 h 14 after UA 3852 arrives on the timetable: more than half a day, so not a connection we count.