Mexico City Benito Juárez International Airport — Mexico City, Mexico

Mexico City International Airport (MEX), officially named for former president Benito Juárez, sits at an elevation above 7,300 feet, making the thin air a genuine engineering challenge that forces aircraft to use longer takeoff rolls and often accept reduced payloads. As one of the busiest airports in Latin America and the primary hub for Aeroméxico, MEX has long operated near or beyond its designed capacity, with the surrounding urban sprawl of Mexico City leaving little room for physical expansion. That congestion drove the construction of the newer Felipe Ángeles International Airport north of the city, intended to divert some traffic, though MEX has remained the dominant gateway for both domestic and international travelers. The airport sits within the city's built-up eastern area, giving it a famously short taxi and drive time to many neighborhoods compared with airports built farther from other major capitals.