Which airport code is designated for Des Moines, Iowa?

The designated airport code for Des Moines, Iowa, is DSM. This code is derived from the city's name, where the 'D' stands for Des and the 'SM' represents the Iowa's capital city, matching its airport identification system. Airport codes are typically assigned based on a combination of factors, including the name of the city or the airport itself, and DSM is a clear example of this practice.

In contrast, FSD is the airport code for Sioux Falls, South Dakota; GSP serves Greenville-Spartanburg International Airport in South Carolina; and GJT denotes the code for Grand Junction Regional Airport in Colorado. None of these codes correspond to Des Moines, underscoring that DSM is indeed the correct and officially recognized designation for Des Moines International Airport.