The International Aviation Services Organization (IASO) is a global nonprofit professional industry forum for airport and aviation service providers. The organization acts as a parent association for all aviation service organizations worldwide, consulting on issues and developing best-practice policies for the entire industry. The IASO aims to address key issues impacting the air freight and logistics sectors, as well as other aviation practices.

The IASO collaborates with various international members of the aviation service industry, implementing ideal business practices and ensuring credible representation for all IASO industry members. The organization’s headquarters are located in Geneva, Switzerland, a city that lies at the southern tip of Lac Léman (Lake Geneva).

IASO is distinct from other international air organizations, but it does link with established associations like the International Civil Aviation Organization (ICAO), a UN specialized agency; the International Air Transport Association (IATA), a trade association; and the Middle East and North Africa Business Aviation Association (MEBAA), a business aviation forum.