UA 1901 then UA 3755 at Houston
Guatemala City → Houston → Lubbock
Timetable, Houston time
10:03UA 1901 from Guatemala City at the gate
22:10UA 3755 to Lubbock leaves the gate
12 h 07 apart on the timetable
UA 3755 leaves 12 h 07 after UA 1901 arrives on the timetable: more than half a day, so not a connection we count.