San Francisco to Las Vegas or vice versa $56 RT on United Airlines (Mar-Apr) Nonstop

lucky day for san francisco users…this is my 3rd SFO deal today!
United Airlines have roundtrip airfares travelling to and from San Francisco (SFO) and Las Vegas (LAS) for $56 including taxes and fees. This is nonstop service. There are several flights daily and multiple flights on these dates will apply.
Travel availability:
Depart SFO: March 21, 22, 28, 29, April 4, 11
Depart LAS:: March 15, 21, 28, 29
Returns: Use one of the dates above
plug dates into Priceline , Orbitz , CheapOAir , Expedia or United Airlines directly
See sample prices from Priceline