Which organization promotes cooperation among entities in the air transport industry?

The Airports Council International (ACI) is the organization that promotes cooperation among entities in the air transport industry. ACI serves as a global trade representative for airports and works to facilitate collaboration between different stakeholders within the aviation sector, including airline operators, government bodies, and regulatory agencies. This cooperation is essential for addressing common challenges and advancing initiatives that enhance the efficiency, safety, and sustainability of airport operations worldwide.

ACI focuses on issues relevant to airport management and operations, striving to create a unified voice for airports in international discussions. This collaborative effort allows for the sharing of best practices, development of standards, and advancement of policies that benefit the entire air transport system.

While the other options represent significant organizations in air transport, their primary focuses differ. For example, the International Air Transport Association (IATA) primarily concentrates on the airline industry and its operations. The Regional Airline Association (RAA) is focused on the specific interests of regional airlines, and the National Business Aviation Association (NBAA) caters to users of business aviation. Thus, while all these organizations play vital roles in the air transport ecosystem, ACI's emphasis on promoting cooperation across various entities makes it the correct answer in this context.