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There are 2 airports in Santiago. Santiago Municipal Airport (STI) is Santiago’s primary airport with at least domestic flights and international flights departing from its runways every week. As of today, airlines operate out of Santiago Municipal Airport (STI). Santiago Municipal Airport (STI) is 7.8 miles from Santiago and offers nonstop flights to cities. Santiago’s secondary airport La Union Airport (POP) is 22.3 miles from Santiago and has airlines operating out of it and offers nonstop flights to cities with at least domestic flights and international flights departing each week.