Which city does the code SAN represent?

The city code SAN represents San Diego, California. In the context of airline travel, each city is assigned a unique three-letter code that is used for ticketing, baggage handling, and flight operations. SAN is derived from the name San Diego, which is a major city located in Southern California known for its beaches, parks, and mild climate.

The other codes, while they include similar naming conventions with "San," correspond to different locations. San Antonio in Texas is identified by the code SAT, San Jose in California is SJ, and Santa Rosa uses the code STS. Thus, only SAN accurately corresponds to San Diego.