Adolfo Suárez Madrid-Barajas Airport is the main international airport serving Madrid, the capital of Spain. It is located about 12 kilometers northeast of the city center and is one of the busiest airports in Europe. The airport has four terminals, with Terminal 4 being the largest and most modern, designed to handle a significant volume of passengers and flights. Opened in 1931, the airport has undergone several expansions and renovations to accommodate growing air traffic. It serves as a major hub for both domestic and international flights, connecting travelers to various destinations around the world.