UA 4237 then UA 3917 at Houston
Hobbs → Houston → Austin
Timetable, Houston time
11:10UA 4237 from Hobbs at the gate
07:30UA 3917 to Austin leaves the gate
20 h 20 apart on the timetable, overnight
UA 3917 leaves 20 h 20 after UA 4237 arrives on the timetable: more than half a day, so not a connection we count.