UA 678 then UA 3755 at Houston
Mc Allen → Houston → Lubbock
Timetable, Houston time
08:24UA 678 from Mc Allen at the gate
22:10UA 3755 to Lubbock leaves the gate
13 h 46 apart on the timetable
UA 3755 leaves 13 h 46 after UA 678 arrives on the timetable: more than half a day, so not a connection we count.