UA 3236 then UA 1687 at Houston
Midland → Houston → Indianapolis
Timetable, Houston time
18:30UA 3236 from Midland at the gate
12:10UA 1687 to Indianapolis leaves the gate
17 h 40 apart on the timetable, overnight
UA 1687 leaves 17 h 40 after UA 3236 arrives on the timetable: more than half a day, so not a connection we count.