Orlando International Airport is the primary international airport located 6 miles southeast of Downtown Orlando, Florida. In 2021, it had 19,618,838 enplanements, making it the busiest airport in the state and seventh busiest airport in the United States. The airport code MCO stands for the airport's former name, McCoy Air Force Base, a Strategic Air Command installation, that was closed in 1975 as part of a general military drawdown following the end of the Vietnam War.