What is the city code for San Diego, California?

The city code for San Diego, California, is SAN. This code is derived from the airport identifier for San Diego International Airport (IATA: SAN), which serves as the primary airport for the city. Airport codes typically reflect the name of the city or a related geographical feature, providing a quick and efficient way to identify locations for travelers and airline personnel.

SAN is widely recognized in the travel industry, making it essential for booking flights, tracking baggage, and managing air travel logistics. The other options represent different cities: SFO corresponds to San Francisco, STL is for St. Louis, and TPA denotes Tampa, each with its unique airport code tied to the respective cities they serve. Understanding these codes is vital for distinguishing between various destinations.