UA 3236 then UA 4879 at Houston
Midland → Houston → Huntsville
Timetable, Houston time
18:30UA 3236 from Midland at the gate
12:11UA 4879 to Huntsville leaves the gate
17 h 41 apart on the timetable, overnight
UA 4879 leaves 17 h 41 after UA 3236 arrives on the timetable: more than half a day, so not a connection we count.