The Airport has a 24-hour U.S. Customs operation and is designated an official port of entry by the U.S. Fish and Wildlife Service. BWI has a foreign trade zone in the Air Cargo Center, and a 24-hour on-site cold storage facility with scheduled refrigerated trucking to major destinations in the Baltimore-Washington region.

To expand and enhance service and beautify Airport facilities, a multi-million dollar construction program began in 1994. Some 3,400 public parking spaces were added to satellite lots. A 10,500 foot runway now better accommodates long-haul traffic. Airfield work also began on the new International Pier that includes the Maryland Central Light Rail Line on the lower level, to open in 1997. For Amtrak and MARC passengers, a five-level parking garage is being built.

New carriers added in 1994 include Air Ontario/Air Canada, El Al Israel Airlines, British Airways, Air Aruba, and Ladeco Chilean Airlines. BWI's hub carrier, USAir began flights to St. Thomas, St. Maarten, and Montego Bay, Jamaica.