This research aims to enhance airport infrastructure development in Croatia by focusing on the establishment of a training and school airport near Šibenik, integrating modern design principles and addressing functional needs to support aviation education and training while promoting regional economic growth. This chapter focuses on the theoretical characteristics of project management throughout the project cycle, emphasizing their relevance to the sustainable development of airport infrastructure within the context of transport economics. The case study of an airport near Sibenik serves as a critical foundation for proposing a universal model that integrates airport infrastructure, project management, and metrological steps for integration. Key elements such as legal frameworks governing air transport development are evaluated to ensure the model’s applicability and effectiveness within the Croatian air transport system, demonstrating its potential as a viable approach for enhancing sustainable airport operations.