The International Air Transport Association reference article from the English Wikipedia on 24-Jul-2004
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International Air Transport Association

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The International Air Transport Association is an international trade organization of airlines. Airlines have been granted a special exemption to consult prices with each other through this body. The organization has been accused of acting as a cartel, and many low cost carriers are not full IATA members.

IATA assigns 3-letter IATA Airport Codes and 2-letter IATA Airline Designators, which are commonly used worldwide.

A list of major US airline designators

External link