FRA is the airport code for which of the following cities?

FRA is the IATA airport code designated for Frankfurt Airport, which is located in Frankfurt, Germany. This airport is one of the busiest in Europe and serves as a major international hub for both passenger and cargo traffic. The code itself is derived from the city name, making it easier for travelers and airline staff to identify the location in a standardized three-letter format. Frankfurt airport's significant role in international travel, alongside its connectivity to various global destinations, reinforces its recognition through this airport code. Other cities listed have their own unique airport codes, which are not associated with the FRA designation.