The International Civil Aviation Organization (ICAO) is a United Nations agency which helps 193 countries to cooperate together and share their skies to their mutual benefit.

The International Civil Aviation Organization (ICAO) is a United Nations agency which helps 193 countries to cooperate together and share their skies to their mutual benefit.

ICAO defines an International Standard Atmosphere (also known as ICAO Standard Atmosphere), a model of the standard variation of pressure, temperature, density, and viscosity with altitude in the …

The ICAO airport code or ICAO location indicator is a four-letter code designating aerodromes around the world. These codes are defined by the International Civil Aviation Organization (ICAO) and …

Browse airports by ICAO codes starting with the letter A. Find every airport code in the world.

Look up IATA and ICAO airport codes for 4,000+ airports worldwide. Find airport codes by city, country or continent.

Dec 7, 2020 · Imagine flying in a world where every country had different rules. Pilots of international flights would have to mark each border they crossed by speaking to co...

Jun 22, 2026 · International Civil Aviation Organization (ICAO), intergovernmental specialized agency associated with the United Nations (UN).

The constitution of ICAO is the Convention on International Civil Aviation, drawn up by a conference in Chicago in November and December 1944, and to which each ICAO Contracting State is a party.