UA 3851 then UA 253 at Houston
Seoul → Houston → Honolulu
Timetable, Houston time
17:54UA 3851 from Seoul at the gate
09:30UA 253 to Honolulu leaves the gate
15 h 36 apart on the timetable, overnight
UA 253 leaves 15 h 36 after UA 3851 arrives on the timetable: more than half a day, so not a connection we count.