What city is represented by the city code PHX?

The city code PHX corresponds to Phoenix, Arizona. This is because the International Air Transport Association (IATA) assigns three-letter codes to airports, and PHX has been designated for Phoenix Sky Harbor International Airport, which is the primary airport serving the Phoenix metropolitan area. Understanding city codes like PHX is essential for travelers and individuals involved in the airline and travel industries, as it facilitates clear and efficient communication about flight destinations.