Which airport code is used for Rochester, New York?

The airport code used for Rochester, New York, is ROC. This code is derived from the city's name, making it easy to identify the airport associated with the region. ROC is the IATA code for Greater Rochester International Airport, which serves as the primary airport for the area, facilitating both domestic and some international flights.

The other options represent different locations: RIC is the airport code for Richmond International Airport in Virginia, RST corresponds to Rochester International Airport in Minnesota, and RDU is the airport code for Raleigh-Durham International Airport in North Carolina. Each of these codes is specific to its location, highlighting the importance of understanding IATA codes in relation to their associated airports.