DL 1534 then DL 825 at Atlanta
New Orleans → Atlanta → Las Vegas
Timetable, Atlanta time
09:00DL 1534 from New Orleans at the gate
21:15DL 825 to Las Vegas leaves the gate
12 h 15 apart on the timetable
DL 825 leaves 12 h 15 after DL 1534 arrives on the timetable: more than half a day, so not a connection we count.