FSX Scenery--Dunnellon/Marion County Airport X35, FL. Dunnellon/Marion County Airport is a public use airport located four nautical miles east of the central business district of Dunnellon, in Marion County, Florida. The airport is owned by Dunnellon Airport Authority. It is also known as the Dunnellon/Marion County Airport, Dunnellon Airport and Marion County Airport. The scenery was made with ADE9X (Airport Design Editor 9x). This scenery adds and changes the placement of buildings as was show in Google Earth. Also includes an ILS to runway 23. By Bruce Bouley.