UA 4841 then UA 3917 at Houston
Huntsville → Houston → Austin
Timetable, Houston time
11:00UA 4841 from Huntsville at the gate
07:30UA 3917 to Austin leaves the gate
20 h 30 apart on the timetable, overnight
UA 3917 leaves 20 h 30 after UA 4841 arrives on the timetable: more than half a day, so not a connection we count.