"On behalf of Chicago Mayor Rahm Emanuel and the Chicago Department of Aviation, I want to thank Spirit Airlines for adding new service at O'Hare International Airport to destinations across the U.S.," said Aviation Commissioner Rosemarie S. Andolino. "Spirit's daily service to Denver offers Chicagoans a new, super low fare option on this popular route and further expands the growing number of flight offerings at Chicago's airports."

In addition to planned new service to Denver, Spirit currently provides nonstop service from O'Hare to Boston, Dallas Fort-Worth, Fort Lauderdale, Fla., Fort Myers, Fla., Las Vegas, Los Angeles, New York/LaGuardia and Orlando, Fla. With the new service to Denver, Spirit will nearly double its flight offerings from O'Hare to a total of 17 average flights a day versus nine in 2011.

 "We understand that Denver has been looking for an ultra low cost carrier and we are here to satisfy that need," said Spirit's Chief Marketing Officer Barry Biffle. "Our cheap fares and optional services have saved customers millions because they give consumers the freedom to choose only the extras they value and they only pay for what they use."

Including the new Spirit service, airlines at O'Hare provide an average of 14 daily flights to Denver.