UA 806 then UA 2019 at San Francisco
Seoul → San Francisco → Phoenix
Timetable, San Francisco time
06:30UA 806 from Seoul at the gatealso OZ 6620
18:55UA 2019 to Phoenix leaves the gatealso AC 4465, AZ 4503, LH 9366, NZ 9370
12 h 25 apart on the timetable
UA 2019 leaves 12 h 25 after UA 806 arrives on the timetable: more than half a day, so not a connection we count.