The aim of this study is to evaluate the service quality of the five busiest airports in Europe, namely Istanbul Airport, London Heathrow Airport, Paris Charles De Gaulle Airport, Amsterdam Schiphol Airport, and Madrid Barajas, based on data from Skytrax, which ranks the quality of airlines and airports. These ratings consider a range of criteria, including terminal seating, terminal cleanliness, terminal signs, queuing times, food and beverage, Wi-Fi connectivity, airport shopping, and airport staff. Additionally, overall satisfaction ratings for these services are also included. This study examines the impact of these criteria on overall customer satisfaction using multiple regression analysis. A total of 511 airport ratings collected between January 1, 2019, and May 1, 2024, were used for the analysis, which was conducted using Jamovi. The results show that airport staff and queuing times are the most influential factors on total passenger satisfaction, while terminal cleanliness, terminal signs, and Wi-Fi connectivity do not have a significant impact on customer satisfaction.