A list of the three-letter International Air Transport Associate airport codes familiar to airline passengers can be found on the Mapping.com and Expedia websites. Both websites allow site users to search using city, country or code. Mapping.com also allows searching by International Civil Aviation Organization and Federal Aviation Administration codes.
IATA codes are seen on airline reservations, tickets and baggage tags. These three letters are location identifiers usually taken from the name of the city in which the airport is located. Cities with more than one airport have codes based on the name of the airport itself. This system is also used by railway lines in several countries. ICAO codes are used by airports that do not have an IATA identifier. FAA codes cover private airfields, military locations and major airports.