UA 4863 then UA 3755 at Houston
Lubbock → Houston → Lubbock
Timetable, Houston time
08:36UA 4863 from Lubbock at the gate
22:10UA 3755 to Lubbock leaves the gate
13 h 34 apart on the timetable
UA 3755 leaves 13 h 34 after UA 4863 arrives on the timetable: more than half a day, so not a connection we count.