UA 4301 then VB 611 at Houston
Lubbock → Houston → Monterrey
Timetable, Houston time
18:41UA 4301 from Lubbock at the gate
08:50VB 611 to Monterrey leaves the gate
14 h 09 apart on the timetable, overnight
VB 611 leaves 14 h 09 after UA 4301 arrives on the timetable: more than half a day, so not a connection we count.