8Charles de Gaulle Airport (Paris, France)

Despite being one of the busiest airports in Europe, Charles de Gaulle (CDG) in Paris has earned a reputation for poor customer service and a confusing layout. Travelers frequently complain about long security lines, disorganized check-in processes, and rude staff. The airport’s terminals are spread out, requiring long walking distances between gates and transfers. While CDG has modernized some areas, many travelers still find the overall experience stressful and inconvenient, especially when navigating connecting flights.