Aranda de Duero is a city and municipality, capital of the Ribera del Duero comarca, in the south of the province of Burgos, in Castile and León, …Aranda de Duero is a city and municipality, capital of the Ribera del Duero comarca, in the south of the province of Burgos, in Castile and León, Spain. It has a population of roughly 33,000 people and lies on the River Duero. The closest international airport is Madrid Barajas.