American Airlnies have round trip airfares travelling to and from Newark (EWR) and Las Vegas (LAS) for $160's, making one stop in Charlotte. This is a main cabin, regular economy.
Travel Availability shown below BUT play around with other dates because I may have missed a few.
Departs EWR: April 26, 27, 28; May 5, 8; Aug 21; Sept 11
Departs LAS: May 5, 4; Aug 28; Sept 11, 18
Returns: generally 7-day stay
Use dates and book it on American Airlines [aa.com]
. Play around with dates if you don't see ones that you might like to do. This deal is for regular economy so be sure yours say the same.