DL 172 then F9 4949 at Salt Lake City
Seoul → Salt Lake City → Phoenix Sky Harbor
Timetable, Salt Lake City time
13:47DL 172 from Seoul at the gate
13:01F9 4949 to Phoenix Sky Harbor leaves the gate
23 h 14 apart on the timetable, overnight
F9 4949 leaves 23 h 14 after DL 172 arrives on the timetable: more than half a day, so not a connection we count.