DL 1682 then UA 3917 at Houston
Atlanta → Houston → Austin
Timetable, Houston time
11:27DL 1682 from Atlanta at the gate
07:30UA 3917 to Austin leaves the gate
20 h 03 apart on the timetable, overnight
UA 3917 leaves 20 h 03 after DL 1682 arrives on the timetable: more than half a day, so not a connection we count.