Orlando International Airport officially adopted the "MCO" code and its current name in 1976. The code "MCO" is a legacy of the site's history as McCoy Air Force Base, which was named in honor of Colonel Michael N.W. McCoy, who was killed in a B-47 crash in 1958. After the base was closed in 1975 following a post-Vietnam military drawdown, the land was deeded to the city of Orlando for civil aviation use. While the airport had operated as "Orlando Jetport at McCoy" for several years, the 1976 renaming to Orlando International Airport signaled its transition into a major global hub. In 2026, as the airport celebrates its 50th year as an international facility, the "MCO" code remains a permanent tribute to the site's military heritage, even though most travelers now associate it with theme parks and Florida sunshine. The airport has grown from a quiet military landing strip into the busiest airport in Florida, recently reaching a record of over 57 million annual passengers.