International Tourism Looms Big for Las Vegas CheapOair Staff July 8, 2011 general International spending is the biggest it’s ever been in Las Vegas according to the Breaking Travel News report. U.S. Department of Commerce said international visits made up 18 percent those coming to Vegas. It was a 17.8 percent jump. They spend too! International tourists made up 27 percent of the tourism revenue in 2010. President of the Las Vegas Convention and Visitors Authority (LVCVA) intends to expand on the international market by 30 percent in the next decade.