Which city code corresponds to Minneapolis/St. Paul, MN?

The city code that corresponds to Minneapolis/St. Paul, MN is MSP. This code is derived from the airport's official name, Minneapolis−Saint Paul International Airport, which serves both cities in the Twin Cities metropolitan area. Airport codes are typically based on either the name of the city or the airport, and in this case, MSP directly reflects the geographical and cultural significance of the area, making it easy for travelers and airlines to identify. Other options do not relate to Minneapolis/St. Paul; for example, the other codes represent different locations, with SJO referring to Juan Santamaría International Airport in Costa Rica, SNA to John Wayne Airport in California, and TUL to Tulsa International Airport in Oklahoma. These distinctions further highlight why MSP is the correct designation for the Twin Cities area.