DL 1682 then DL 659 at Atlanta
Houston → Atlanta → Las Vegas
Timetable, Atlanta time
15:31DL 1682 from Houston at the gate
15:29DL 659 to Las Vegas leaves the gate
23 h 58 apart on the timetable, overnight
DL 659 leaves 23 h 58 after DL 1682 arrives on the timetable: more than half a day, so not a connection we count.