With the demise of Spirit Airlines earlier this year, American travelers now have one less Ultra Low-Cost Carrier (ULCC) in market. As a loss of such an airline often means the increase of fares, it presents an opportunity for other budget airlines in the market, like Frontier Airlines, to take over their routes and help keep that from happening. Already, the Denver-based airline is aiming to fill the gap in the market, with 38 new routes being introduced in the last year.