UA 4301 then UA 3983 at Houston
Lubbock → Houston → El Paso
Timetable, Houston time
18:41UA 4301 from Lubbock at the gate
17:05UA 3983 to El Paso leaves the gate
22 h 24 apart on the timetable, overnight
UA 3983 leaves 22 h 24 after UA 4301 arrives on the timetable: more than half a day, so not a connection we count.