UA 281 then UA 3755 at Houston
Oklahoma City → Houston → Lubbock
Timetable, Houston time
08:39UA 281 from Oklahoma City at the gate
22:10UA 3755 to Lubbock leaves the gate
13 h 31 apart on the timetable
UA 3755 leaves 13 h 31 after UA 281 arrives on the timetable: more than half a day, so not a connection we count.