DL 1682 then UA 575 at Houston
Atlanta → Houston → Las Vegas
Timetable, Houston time
11:27DL 1682 from Atlanta at the gate
10:55UA 575 to Las Vegas leaves the gate
23 h 28 apart on the timetable, overnight
UA 575 leaves 23 h 28 after DL 1682 arrives on the timetable: more than half a day, so not a connection we count.