As of 2026, Dallas/Fort Worth International Airport (DFW) in the United States holds the record for the most passenger terminals in operation, with a total of five massive terminals (A, B, C, D, and E). While other global hubs like Chicago O'Hare (ORD) also have five, DFW’s unique semi-circular design makes the terminals more distinct and spread out. However, if we consider "complexes" or future expansions, King Khalid International Airport (RUH) in Riyadh recently completed a major terminal reallocation in February 2026, boosting its capacity and operational efficiency across its five terminals to handle 56 million passengers. While some mega-airports like Beijing Daxing or Istanbul Airport consist of a single, world-record-breaking massive building that rivals the square footage of multiple terminals, DFW remains the benchmark for a multi-terminal layout designed to facilitate domestic and international transfers on a colossal scale.