Charlotte/Douglas International Airport is the 8th busiest airport in the U.S. and ninth busiest in the world as measured by traffic.It is served by many domestic airlines, as well as international airlines Air Canada, Insel Air, and Lufthansa, and is the largest hub of US Airways. Nonstop flights are available to many destinations across the United States, as well as flights to Canada, Central America, the Caribbean, Europe, Mexico, and South America.