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What are ICAO codes?

ICAO stands for the International Civil Aviation Organization and constitutes the United Nations' Specialized Agency for civil aviation.  It maintains a list of airline and airport codes used by air traffic controllers and pilots for flight planning and in-flight communications.  Its airline codes consist of 3-letters while its airport codes use 4-letters.  For example, the ICAO code for British Airways is BAW while the code for San Francisco International Airport is KSFO.

last updated 2008.09.15
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