International cooperation plays an important role in the development of countries, providing access to resources, technologies and knowledge necessary for modernization of the economy and increasing its competitiveness. This study aims to identify the key functions of international cooperation in the aerospace industry, which requires significant investments and a high degree of coordination of all participants. Using methods of analysis, systematization and generalization, it was determined that international partnership contributes to the diversification of the economy, increased reliability of supply chains, technological independence and integration into global markets. In the context of globalization, cooperation ensures the acceleration of scientific and technological progress and the solution of strategically important problems. The outcomes of the study confirm the importance of international cooperation for the sustainable development of countries, especially in high-tech industries such as the aerospace industry.