FSX/Prepar3D – Scenery MMCN-Ciudad Obregon. Ciudad Obregon International Airport (IATA: CEN, ICAO: MMCN) is an international airport located in Ciudad Obregon, Sonora, Mexico. It has one terminal with three gates and two jetways and two additional commercial aircraft parking spaces. The airport is operated by Aeropuertos y Servicios Auxiliares, a federal government-owned corporation. By Fernando Angel G.