UA 3236 then UA 6233 at Houston
Midland → Houston → Midland
Timetable, Houston time
18:30UA 3236 from Midland at the gate
16:35UA 6233 to Midland leaves the gate
22 h 05 apart on the timetable, overnight
UA 6233 leaves 22 h 05 after UA 3236 arrives on the timetable: more than half a day, so not a connection we count.