What is the airport code for Rapid City, South Dakota?

The airport code for Rapid City, South Dakota, is RAP. Each airport is assigned a unique three-letter code, known as an International Air Transport Association (IATA) code, that helps identify it in the airline industry. RAP specifically corresponds to Rapid City Regional Airport, which serves the city and the surrounding region.

In contrast, the other codes represent different airports located in other regions. RDU is the airport code for Raleigh-Durham International Airport in North Carolina, ROC stands for Greater Rochester International Airport in New York, and RIC is the code for Richmond International Airport in Virginia. Thus, RAP is the only code that correctly identifies Rapid City Regional Airport, making it the accurate choice for this question.