The aim of this thesis is to investigate the socio-economic feasibility of introducing FPT in Athens. For this purpose, a social-economic analysis, in the context of a Cost Benefit Analysis (CBA), was conducted to assess the socio-economic impact of the FPT, up to the year 2030. In the framework of the CBA, four Scenarios were examined considering 0% (S0-do nothing), 50% (S1), 73% (S2) and 100% (S3) discount, respectively, on public transport tickets. Consequently, a multinomial logistic model was developed to investigate for each of the three Scenarios the level preferring Athenians the FPT over private car, using data from a stated preference questionnaire survey. This social-economic analysis demonstrated that the introduction of FPT in Athens can contribute to social welfare mainly due to the modal shift from private cars to public transport.