Passenger ports are as important as other ports in the Mediterranean region. Efficiency assessments are essential for promoting economic growth, ensuring environmental sustainability, improving passenger services and optimizing strategic operations. This paper presents a sustainability-based performance assessment of Mediterranean passenger terminals using advanced mathematical programming methods to evaluate their environmental performance. The study aims to identify key sustainability indicators and analyze their impact on the efficiency and environmental performance of terminal operations. By integrating these indicators into the performance assessment, the study provides valuable insights that could influence policy and improve operational practices in the sector. The results are expected to support the development of more sustainable passenger terminal operations, contributing to broader environmental goals and improving the overall efficiency and sustainability of the Mediterranean maritime industry. This comprehensive approach underlines the importance of sustainable practices in maintaining the vitality and competitiveness of passenger ports in this region.