swiss Airlines IAD Terminal , B at Washington Dulles International Airport (IAD). As part of the Lufthansa Group, Swiss offers flights to Zurich and connects passengers to over 100 destinations worldwide. Terminal B provides modern amenities including dining options, duty-free shopping, and comfortable lounges for travelers flying with Swiss Airlines. Passengers can expect efficient check-in procedures and seamless connections within the terminal, ensuring a smooth and enjoyable travel experience from Washington, D.C. to destinations across Europe and beyond.