WestJet Airlines IAD Terminal at Dulles International Airport for both domestic and international flights.At the WestJet Airlines IAD Terminal, travelers have access to essential services and amenities including check-in, baggage handling, security screening, and more, all within one terminal.. Located in the Washington, D.C. metropolitan area, this terminal serves as a gateway for WestJet's flights connecting travelers to various domestic and international destinations. For more information you can go through our website.