The aviation sector is a sector that works with high costs and where competition and demand increase day by day. Since the development of the airline sector increases economic activities, employment and income increase, thus contributing to the companies serving airline companies. For this reason, it is necessary to determine whether the company's financial resources are used effectively. Company executives and investors also want to follow the financial performance of airline companies and have information about the financial status of the company. For this reason, the situation of the companies is observed by performing different analyzes from time to time. In this context, within the scope of the study, it is aimed to measure the financial performance of 6 airline operators operating in Europe between the periods of 2019-2021. For performance measurement, 8 financial criteria were used: current ratio, cash ratio, financial leverage ratio, equity multiplier, asset turnover rate, equity turnover rate, return on equity and return on assets ratio. For the analysis of these criteria, the importance levels of the criteria related to the CRITIC method, one of the MCDM methods, were determined. At the same time, with the MAUT and MARCOS methods, the financial performance ranking of the airline enterprises was obtained according to the relevant years. According to the findings of the CRITIC method; It was determined that the equity multiplier in 2019, the current rate in 2020 and finally the equity turnover rate criteria in 2021 were the most important criteria. As a result of the MAUT method, the airlines with the best financial performance in 2019, 2020 and 2021, respectively, are Air France, EasyJet and Pegasus Airlines. According to the findings of the MARCOS method, the airline operator with the highest financial performance in 2019 was determined as Turkish Airlines and Pegasus Airlines in 2020 and 2021.