Charlotte Douglas International Airport (CLT) is considered a very large and busy airport, contrary to what its "mid-sized" city status might suggest. In 2026, it consistently ranks as one of the top 10 busiest airports in the world by aircraft movements and top 20 for passenger traffic. This is primarily because it serves as the second-largest hub for American Airlines. The airport features a massive "single terminal" complex with five concourses (A-E) and over 120 gates. In early 2026, the "Destination CLT" expansion project continues to add square footage, including a revamped terminal lobby and expanded gates in Concourse A. While it is physically easier to navigate than a sprawling multi-terminal airport like O'Hare or Heathrow, the sheer volume of connecting passengers makes it feel extremely crowded during "peak banks" (the windows when dozens of flights arrive and depart simultaneously).