Adolfo Suárez Madrid–Barajas is the main international airport in Spain. In 2013, almost 40 million passengers used Madrid–Barajas, making it the country’s largest and busiest airport, and in 2013 it was Europe’s sixth busiest airport. The airport is the primary hub and maintenance base for Iberia.
The airport was constructed in 1927, opening to national and international air traffic in 1931, although regular commercial operations began two years later.
Source: Wikipedia
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