Sun Country IAD Terminal has its own terminal at Washington Dulles International Airport (IAD), where it flies to and from the bustling Washington, D.C. area. The airline's presence at IAD provides passengers with quick check-in procedures, a variety of amenities within the terminal, and convenient access to their flights. Passengers can take advantage of low-cost air travel options at Sun Country without sacrificing comfort or service. Sun Country is a popular choice for both leisure and business travelers due to IAD's seamless connections, welcoming atmosphere, and hassle-free experience.