Frontier Airlines, Inc. - A whole different animal. Frontier is an affordable fare airline that provides service from its Denver hub. The airline is the second largest jet user of Denver International Airport. Service features include advanced seat assignments, electronic ticketing, flight status paging notification, quality inflight snacks and EarlyReturns, Frontier's frequent flyer plan. Frontier's Web site may be viewed at www.frontierairlines.com. in travelwith affordableairlinedenverfarefrontierhubservicetravelby 3 users