Adolfo Suárez Madrid–Barajas Airport is the main international airport serving Madrid, the capital city of Spain. At 3,050 ha in area, it is the second-largest airport in Europe by physical size behind Paris Charles de Gaulle Airport. In 2019, 61.8 million passengers travelled through Madrid–Barajas, making it the country's busiest airport as well as Europe's fifth-busiest. The airport opened in 1931 and has grown to be one of Europe's most important aviation centres.