Local News Fall Day At DIA November 23, 2011 / 6:19 AM MST / CBS News (credit: CBS) Frontier Airlines A Frontier Airlines plane at Denver International Airport (credit: CBS) US Airways Plane (credit: CBS) Air Traffic Control Tower (credit: CBS) DIA From A Distance (credit: CBS) United Airlines Plane (credit: CBS) Southwest Airlines Plane (credit: CBS) Southwest Airlines Plane File photo of a Southwest Airlines jet. (credit: CBS) Frontier Airlines Plane (credit: CBS) American Airlines Plane (credit: CBS) Frontier Airlines Plane (credit: CBS) Denver International Airport Denver International Airport (credit: CBS) United Airlines Plane DIA Generic (credit: CBS) Delta Airlines Plane (credit: CBS) American Airlines Plane (credit: CBS)