What is the city code for Mexico City?

The city code for Mexico City is MEX. This code is designated by the International Air Transport Association (IATA) and serves as a universally recognized identifier for the airport in Mexico City. Each airport worldwide has a unique IATA code, making it easier for travelers, airlines, and booking systems to reference specific locations quickly and accurately.

In this case, MEX is derived from the name of the city, making it intuitive for passengers and those involved in air travel logistics. Other codes included in the options pertain to different cities—IND refers to Indianapolis, RSW corresponds to Southwest Florida International Airport, and SFO is the code for San Francisco International Airport. While these cities have their own airports and IATA codes, they are not associated with Mexico City, which further highlights why MEX is the correct choice.