The code IAD refers to which international airport?

IAD is the airport code for Washington Dulles International Airport, located in Virginia, serving the Washington, D.C. metropolitan area. It is a major hub for international flights and is named after John Foster Dulles, who was U.S. Secretary of State in the 1950s. The use of three-letter codes for airports is standardized by the International Air Transport Association (IATA), making it straightforward to identify airports around the world.

Other airport codes are distinct: Los Angeles International is represented by LAX, San Francisco International by SFO, and Newark Liberty International by EWR. These representations ensure clarity and efficiency in air travel communication, especially in ticketing and flight scheduling. Therefore, IAD as a code uniquely identifies Washington Dulles International Airport among others.