Welcome to Northern Virginia and Metropolitan Washington DC’s premier exhibition facility for consumer shows and trade events. Dulles Expo Center has two halls totaling 130,000 sq ft of exhibition space. Dulles Expo Center is located in the heart of Northern Virginia’s high-tech corridor on Route 28, between I-66 and the Dulles Toll Road in Fairfax County, VA. Dulles Expo Center is six miles south of Dulles International Airport and just 26 miles from Washington, DC.