Charlotte Douglas International Airport (CLT) is unique among major U.S. hubs because it operates with only one main terminal building. While it may feel like a multi-terminal airport due to its massive size, it is technically a single terminal that houses all ticketing, security checkpoints, and baggage claim areas. From this central hub, the airport fans out into five separate concourses (A, B, C, D, and E), which collectively contain over 120 gates. This centralized design means that once you pass through security, you can walk to any gate in any concourse without needing to exit and re-enter security or board a shuttle train. In 2026, the airport is continuing its "Destination CLT" renovation project, which has significantly expanded the main terminal lobby to handle the high volume of passengers passing through this American Airlines fortress hub, but the fundamental "one terminal" layout remains the core of the airport's infrastructure.