UA 2833 then UA 3755 at Houston
Chicago → Houston → Lubbock
Timetable, Houston time
09:50UA 2833 from Chicago at the gate
22:10UA 3755 to Lubbock leaves the gate
12 h 20 apart on the timetable
UA 3755 leaves 12 h 20 after UA 2833 arrives on the timetable: more than half a day, so not a connection we count.