Since 2010, the airport's passenger figures have doubled. Porter Airlines briefly served Charleston with flights to Toronto in 2015. In 2001, Air Canada briefly served the airport from Toronto but ended service immediately after the September 11th attacks. The airport has had brief periods of international service. Aside from the legacy carriers, Charleston has seen periods of additional air service from other carriers, but prior to 2010, those services were short-lived. Throughout its history, all three domestic legacy carriers ( American Airlines, Delta Air Lines, and United Airlines) and their predecessor companies or affiliates have served Charleston International Airport. Additional facilities to complement aircraft assembly have since been announced by the company. The facility began limited operations in July 2011 and rolled out its first completed aircraft in April 2012. In October 2009, Boeing announced that it would build a major plant on 265 acres at the airport as a second final assembly site for its 787 Dreamliner commercial aircraft. The current terminal on the south end of the airport was built in the 1980s on land acquired by Georgia Pacific. In 1979, the civilian portions of the airport were transferred from the City of Charleston to the Charleston County Aviation Authority, which had operated two other airports in the area. In 1949, a new passenger terminal was built.Дuring the Korean War, the airfield was reactivated for military use and in 1952, the City of Charleston and the United States Air Force reached an agreement on control of the base and the runways-an arrangement that has been renegotiated over time and that continues to this day.

After the war, the airfield reverted to civilian use for a short time. In World War II, control of the airfield passed to the United States Army though civilian service was allowed to continue to use the airfield. Within ten years, three runways were paved and outfitted with lighting for nighttime operations. Although privately developed at first, the City of Charleston floated bonds in 1931 to acquire a portion of the site for passenger service. In 1928, the Charleston Airport Corporation was founded and purchased 700 acres of land previously belonging to a mining company.

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