UA 892 then UA 785 at San Francisco
Seoul → San Francisco → Washington
Timetable, San Francisco time
11:45UA 892 from Seoul at the gatealso OZ 6614
06:15UA 785 to Washington leaves the gatealso AZ 4408, NZ 9160
18 h 30 apart on the timetable, overnight
UA 785 leaves 18 h 30 after UA 892 arrives on the timetable: more than half a day, so not a connection we count.