UA 4016 then UA 3755 at Houston
Harlingen → Houston → Lubbock
Timetable, Houston time
06:32UA 4016 from Harlingen at the gate
22:10UA 3755 to Lubbock leaves the gate
15 h 38 apart on the timetable
UA 3755 leaves 15 h 38 after UA 4016 arrives on the timetable: more than half a day, so not a connection we count.