UA 3903 then DL 335 at San Francisco
Seoul → San Francisco → Detroit
Timetable, San Francisco time
08:46UA 3903 from Seoul at the gate
22:40DL 335 to Detroit leaves the gatealso WS 8016
13 h 54 apart on the timetable
DL 335 leaves 13 h 54 after UA 3903 arrives on the timetable: more than half a day, so not a connection we count.