DL 755 then DL 3507 at Atlanta
Las Vegas → Atlanta → Shreveport
Timetable, Atlanta time
12:46DL 755 from Las Vegas at the gate
11:00DL 3507 to Shreveport leaves the gate
22 h 14 apart on the timetable, overnight
DL 3507 leaves 22 h 14 after DL 755 arrives on the timetable: more than half a day, so not a connection we count.