Allegiant Air is a major American airline headquartered in Las Vegas, Nevada. The airline focuses on serving leisure traffic from small and medium-sized cities which it considers to be underserved, using an ultra low-cost business model with minimal inclusions in fares and a greater number of add-on fees. Allegiant was founded in 1997 and is wholly owned by Allegiant Travel Company, a publicly traded company with 5,600 employees and over US$2.6 billion market capitalization in 2016. The airline is the fourteenth-largest in North America. Wikipedia