Purpose – The purpose of this paper is to analyze airport efficiency using the DEA methodology as airport activities are an important factor to support economic activities and environmental issues. Design/Methodology/Approach – Based on the DEA methodology, traditional analysis including BCC, CCR, and Super Efficiency analysis have been utilized to analyze the trends of efficiency in economic indexes. The Malmquist Analysis results also show productivity changes before and after COVID-19. This paper conducted research on the efficiency of the Korean airports in operational and environmental aspects. Adopting DEA models, seven variables were selected for analysis. Findings – This paper found that efficient airports are mainly supported by their large business markets, better hinterland connectivity, being a major airport, and effective resource management. Also, comparing the overall productivity of Korean Airports from 2018-2020, it is fair to say that from 2018 to 2019, before COVID-19, internal factors were driving the overall productivity change. Following other airports, Yeosu were successful in enhancing the efficiencies of the internal operation of airports in the 2020 period. It is also notable that, during COVID-19, the level of cargo at Incheon International Airport, and skyrocketed passenger movements at Jeju International Airport affected the level of efficiency. After COVID-19, although internal efficiency was apparently evident as a decisive factor for overall productivity for most airports, some airports (Jeju, Pohang, and Yangyang) focused on external factors such as technology, which was driving the overall productivity change in their operation compared to others in the sample in this study. Research Implications – This study implies that COVID-19effects on global trade have changed the way airports operate, as most airports now focus on and invest in safety instruments as well as cargo support services and auxiliary services. Airports will confront an enormous task in the coming years, and these goals are ideologically compatible with sustainable development goals. Airports are here to endorse sustainable development, as well as facilitate possibilities and connectivity, and the disclosure of ESG business information are the appropriate resource to help expansion and improvement.
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