The airport industry benefits by adopting Artificial Intelligence (AI)/Natural Language Processing (NLP), improving passenger experience, service quality, and operational efficiency. This literature review examines the role of NLP in airport business management, highlighting its applications in customer experience, service quality, business process and strategy development. Through a thematic analysis, this study analyses the important themes already examined and suggests future research. It was found that current research mainly focuses on passenger insights, customer experiences, and airport service quality. Future studies should consider the influence of NLP in other areas, such as revenue generation and business development. This literature review aims to provide a deep understanding of the trends in the airport industry in adopting one of the AI technologies, NLP.