Which airport is represented by the code MEX?

The airport code MEX uniquely identifies Mexico City International Airport, which is the primary airport serving Mexico City, the capital and largest city of Mexico. In the context of airport codes, each airport is assigned a three-letter code that is standardized and recognized internationally. MEX is derived from the city name Mexico and is distinctively recognized in global travel and airline systems.

The other options represent different cities and airports that have their own unique codes. Orlando, for instance, is known by the code MCO, Long Beach has the code LGB, and Memphis is represented by MEM. Each of these codes serves a specific location, and MEX specifically relates to Mexico City, underscoring its status as a major hub for domestic and international flights in and out of Mexico.