Air transport industry is growing rapidly in all around the world. It is especially important that busy airports operate effectively and efficiently. Therefore, measuring airports' efficiency and performance is essential for planning, expansion, and improving the services provided. The Covid-19 pandemic has also negatively affected the air transport industry, especially airports. The aim of this study is to investigate the efficiency of airports in Europe before and after the pandemic using Data Envelopment Analysis (DEA). Therefore, a comparison of the efficiency of airports for the period before and after the pandemic was made using aviation data for the period between 2019 and 2021. In this context, “number of runways”, “parking capacity”, “distance of the airport to the city center” and “number of aircraft stands” were used as input, and “number of passengers" was used as output. Results reveal that the efficiency values of all airports have decreased significantly compared to values before the pandemic
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