DL 722 then WN 1572 at Atlanta
Las Vegas → Atlanta → Denver
Timetable, Atlanta time
06:34DL 722 from Las Vegas at the gate
18:40WN 1572 to Denver leaves the gate
12 h 06 apart on the timetable
WN 1572 leaves 12 h 06 after DL 722 arrives on the timetable: more than half a day, so not a connection we count.