Q. How do I lookup airport codes?
Bureau of Transportation Statistics (BTS)
List of Worldwide Airport Codes provided by Mapping.com
Airport City Code Database provided by Airportcitycodes.com
Airport Codes provided by AOW
(Note: The above private-sector sites are not maintained by USDOT or any other US Government office. We take no responsibility for the content or accuracy of any non-USDOT web page, and offer the above links strictly as a courtesy, should you be interested.)