UA 3236 then UA 4724 at Houston
Midland → Houston → Memphis
Timetable, Houston time
18:30UA 3236 from Midland at the gate
11:57UA 4724 to Memphis leaves the gate
17 h 27 apart on the timetable, overnight
UA 4724 leaves 17 h 27 after UA 3236 arrives on the timetable: more than half a day, so not a connection we count.