UA 3236 then UA 4287 at Houston
Midland → Houston → Mc Allen
Timetable, Houston time
18:30UA 3236 from Midland at the gate
12:00UA 4287 to Mc Allen leaves the gate
17 h 30 apart on the timetable, overnight
UA 4287 leaves 17 h 30 after UA 3236 arrives on the timetable: more than half a day, so not a connection we count.