UA 1907 then UA 3755 at Houston
Guatemala City → Houston → Lubbock
Timetable, Houston time
05:04UA 1907 from Guatemala City at the gate
22:10UA 3755 to Lubbock leaves the gate
17 h 06 apart on the timetable
UA 3755 leaves 17 h 06 after UA 1907 arrives on the timetable: more than half a day, so not a connection we count.