Adolfo SuÃ¡rez Madridâ€ “ Barajas Airport can be found in Madrid , Paracuellos de Jarama , San SebastiÃ¡n de los Reyes and Alcobendas . It is operated by the ENAIRE organization . The airports 's runway name is 18L/36R and its length is 3500 m. It is 610 m above sea level .