Initially, Frontier will offer one daily direct flight to Denver. But I would expect that number to increase if the route proves popular. Frontier did well with its two daily flights from Dayton to Denver. And many of those travelers were Cincinnati residents.
And, they're offering $99 one-ways to Denver if you book before Feb. 2.
http://www.cvgairport.com/about/news...3-8ba5045c8af1
http://www.bizjournals.com/cincinnat...-airlines.html