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 Metro lines Mexico City Metro lines The Mexico City Metro is the largest and busiest heavy-rail rapid transit system in Mexico and second in North America, only behind the New York City Subway. , the system is composed of 12 lines denominated 1 through 9, 12, A and B, totalling of track length and 195 stations. Of all stations, 115 are underground (either in shallow box-tunnels or deep circular tunnels), 54 are at street-level and 26 are elevated. Line 1's Chapultepec - Zaragoza section was the first of the system to be opened, on September 4, 1969. The line was brought to