The aim of this study is the development and application of a Methodological Framework for the evaluation of airport IT projects. The study was carried out at the Athens International Airport in collaboration with the airport’s IT&T Department. The impact assessment methods used are Cost-Benefit Analysis, Cost-Effectiveness Analysis, and Multi-criteria Analysis. The study begins with an analysis of the evaluation requirements that the decision-maker has at each phase of the project lifecycle, and the economic evaluation parameters of airport IT projects. The following part involves the form and the accuracy of the results obtained from the aforementioned impact assessment methods at each phase of the project lifecycle. The next part includes the proposed Methodological Framework for the evaluation of airport IT projects. The proposed Methodological Framework is applied at a hypothetical airport IT project.