Corn Island International Airport (IATA: RNI, ICAO: MNCI) is an airport that serves Great Corn Island on the South Caribbean Coast Autonomous Region. A new terminal has been built and the runway was refurbished so that medium-sized jet aircraft can land the airport.Corn Island International Airport (IATA: RNI, ICAO: MNCI) is an airport that serves Great Corn Island on the South Caribbean Coast Autonomous Region. A new terminal has been built and the runway was refurbished so that medium-sized jet aircraft can land the airport.