UA 3852 then AC 4083 at San Francisco
Seoul → San Francisco → Santa Ana
Timetable, San Francisco time
08:46UA 3852 from Seoul at the gate
07:00AC 4083 to Santa Ana leaves the gate
22 h 14 apart on the timetable, overnight
AC 4083 leaves 22 h 14 after UA 3852 arrives on the timetable: more than half a day, so not a connection we count.