UA 3852 then AA 2411 at San Francisco
Seoul → San Francisco → Phoenix
Timetable, San Francisco time
08:46UA 3852 from Seoul at the gate
08:40AA 2411 to Phoenix leaves the gate
23 h 54 apart on the timetable, overnight
AA 2411 leaves 23 h 54 after UA 3852 arrives on the timetable: more than half a day, so not a connection we count.