United, Delta, and American are all offering business class roundtrips between Las Vegas and Beijing from $1901. These fares are widely available through the end of November. There are other cities where you can hop on cheap fares though they’re a few hundred dollars more.
We frequently see sales out of Toronto or Vancouver, or on Chinese airlines that have just recently started routes to the U.S. However seeing this kind of fare on the big 3 US carriers is rare indeed.