What is the difference between IATA and ICAO codes?

ICAO codes are the next most widely recognized codes. While IATA codes specifically support the airline travel industry, ICAO codes more broadly support international flight operations regardless of the type of operation (to include general and business aviation).



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ICAO codes are separate and different from IATA codes, which have three letters and are generally used for airline timetables, reservations, and baggage tags. For example, the IATA code for London's Heathrow Airport is LHR and its ICAO code is EGLL.

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With more than 40,000 airports existing in the world, an identification system is required that will serve to unequivocally identify each airport, differentiating it from the rest. The IATA and ICAO aerodrome identification codes serve this purpose.

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By partnering for mutual benefit, IATA works with governments, international organizations such as the International Civil Aviation Organisation (ICAO), and other relevant authorities to help the development of global value chains and to define the correct regulatory framework for the industry.

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As such, pilots, dispatchers, and air traffic controllers work primarily in the ICAO airport code scheme.

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The term non-Contracting States refer to those States which have not ratified nor adhered to the Chicago Convention but that are Members of the UN or of a Specialized Agency. The only non-Contracting States are the Holy See and Liechtenstein.

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As IATA airlines are somewhat stricter in their requirements than the ICAO Technical Instructions, the DGR specifies more precisely how to prepare a shipment.

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Lack of codes There are several airports with scheduled service that have not been assigned ICAO codes that do have IATA codes. For example, several airports in Alaska have scheduled commercial service, such as Stebbins and Nanwalek, which use FAA codes instead.

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Most importantly, IATA provides a powerful, unified and experienced voice that supports and promotes the interests of its members through:
  • International recognition and lobbying.
  • Targeting key industry priorities.
  • Driving industry change.
  • Reducing costs.
  • Communication campaigns.
  • Training and other services.


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IATA defines the world into 3 areas (IATA area 1/2/3), and defines the IATA area into small areas (IATA Tariff sub-area). North America / South America / Hawaii etc. South America (Brazil, Chile, Peru etc.) Europe / Middle East etc.

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IATA Members ?From 57 founding members in 1945, IATA now represents some 300 airlines in over 120 countries. Carrying 83% of the world's air traffic, IATA members include the world's leading passenger and cargo airlines.

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Airport codes are now assigned to airports by IATA, the International Air Transport Association, and no two airports can have the same code. (Note to pilots and dispatchers: these can be different than the four-character ICAO codes—i.e., DAL vs. KDAL, or LHR vs.

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IATA is governed by a General Meeting and an executive committee, known as the Board of Governors. The Board's work is supported by nine Advisory Councils.

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The following States were elected from among ICAO's 193 Member States to the Organization's 36 Member Governing Council during the 2022 ICAO Assembly. Australia, Brazil, Canada, China, France, Germany, Italy, Japan, United Kingdom and the United States.

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As a Specialized Agency of the UN, ICAO works closely with the UN, and particularly with the Economic and Social Council. In light of its technical mandate, ICAO also works closely with other UN Specialized Agencies and International Organizations, such as: ?The International Telecommunications Union (ITU);

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Being IATA-certified, travel agencies can issue airline tickets on behalf of airlines. This is the main advantage that eliminates the need for other middlemen, simplifies booking processes, and cuts expenses for both agents and airlines.

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Being IATA-certified, travel agencies can issue airline tickets on behalf of airlines. This is the main advantage that eliminates the need for other middlemen, simplifies booking processes, and cuts expenses for both agents and airlines.

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