DL 748 then DL 1892 at Atlanta
Las Vegas → Atlanta → Chattanooga
Timetable, Atlanta time
19:24DL 748 from Las Vegas at the gate
14:30DL 1892 to Chattanooga leaves the gate
19 h 06 apart on the timetable, overnight
DL 1892 leaves 19 h 06 after DL 748 arrives on the timetable: more than half a day, so not a connection we count.