Mexico City country and international connections. There are some intercity buses that leave directly from the Mexico City International Airport. Mexico City is served by Mexico City International Airport (IATA Airport Code: MEX). This airport is Latin America's busiest, with daily flights to United States and Canada, Mexico, Central America and the Caribbean, South America, Europe and Asia. Aeroméxico (Skyteam) is based at this airport, and provide codeshare agreements with non-Mexican airlines that span the entire globe. The airport is also a hub for Volaris, Interjet and Aeromar. In 2016, the airport handled almost 42 million passengers, about 3.3 million more than
Mexico City air becoming cleaner since 1991, when the air quality was declared to be a public health risk for 355 days of the year. Mexico City is one of the most important economic hubs in Latin America. The city proper produces 15.8% of the country's gross domestic product. According to a study conducted by PwC, Mexico City had a GDP of $390 billion, ranking it as the eighth richest city in the world and the richest in Latin America. Mexico City alone would rank as the 30th largest economy in the world. Mexico City is the greatest contributor to the country's