UA 3236 then UA 6115 at Houston
Midland → Houston → Birmingham (Alabama)
Timetable, Houston time
18:30UA 3236 from Midland at the gate
12:15UA 6115 to Birmingham (Alabama) leaves the gate
17 h 45 apart on the timetable, overnight
UA 6115 leaves 17 h 45 after UA 3236 arrives on the timetable: more than half a day, so not a connection we count.