Washington Dulles International Airport's Terminal B is home to Southwest Airlines (IAD). Southwest Airlines IAD Terminal This terminal provides passengers with a convenient and enjoyable experience while handling domestic flights. Easy access is provided via the Dulles Aerotrain and pedestrian walkways connecting Terminal B to the main terminal. In the terminal, passengers may take advantage of facilities like free Wi-Fi, retail stores, dining options, and charging stations. Southwest offers a variety of flexible check-in methods, such as self-service kiosks, online check-in, and counter services. For a seamless experience, travelers are encouraged to arrive at least 90 minutes before to departure. Passengers using IAD favor Terminal B because of its well-planned layout and Southwest's dependable services.