To enhance itself as the lone airport for a metro area of over 1.6 million people, a new terminal was built on Post Road in 1964, replacing the old 1933 terminal along Airport Road. In 1996 this terminal was replaced, expanding to 18 gates, and adding a lower arrival level and an upper departure level. In 1997 four gates were added. Airlines added flights to T. F. Green Airport, including Air Canada, Southwest, SATA International (which operated flights to the Azores using an A310-300), and Spirit Airlines.