UA 3236 then UA 4354 at Houston
Mc Allen → Houston → Lubbock
Timetable, Houston time
20:10UA 3236 from Mc Allen at the gate
12:05UA 4354 to Lubbock leaves the gate
15 h 55 apart on the timetable, overnight
UA 4354 leaves 15 h 55 after UA 3236 arrives on the timetable: more than half a day, so not a connection we count.