What is the difference between IATA and ICAO flight number?

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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Basically, the ICAO is focused on civil aviation regulations, whereas IATA is a trade association for airlines. The FAA is the United States' civil aviation authority, governing domestic airlines, their operations and regulations.

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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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The ICAO airport codes, also known as location indicators, are the four-letter sequences used by pilots and air traffic controllers in their charts, on-board systems and in communications.

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

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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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The organization sets standards and regulations necessary for aviation safety, security, efficiency, and regularity, as well as for aviation environmental protection. ICAO also serves as a clearinghouse for cooperation and discussion on civil aviation issues among its 193 member-states.

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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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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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Airlines can schedule multiple flights with the same flight number on the same day (sometimes on the same route and sometimes on different flight segments). This varies by carrier.

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Currently, there are 193 members or contracting states in ICAO, which is governed by the ICAO Council, which is composed of 36 member states including the United States.

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ICAO's core mandate, then as today, was to help States to achieve the highest possible degree of uniformity in civil aviation regulations, standards, procedures, and organization.

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The only non-Contracting States are the Holy See and Liechtenstein.

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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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