World Airport CodesDallas-Fort Worth International Airport (DFW) is the 8th busiest airport in the world and the 4th busiest in the USA with over 58 million passengers in 2012.
Denver International
Denver International Airport, also known as DIA, opened in February 1995, and is the only major airport to be built in the US during the last 25 years.
Ronald Reagan Washington National
Ronald Reagan Washington National Airport, whose site was selected by President Franklin D. Roosevelt in 1938, was built on a land which at that moment was underwater, needing more than 15M cubic metres of sand and gravel to be moved to the site.
It first opened in 1941 and it has an average of more than 18M passengers per year. Reagan National Airport only has immigration and customs facilities for corporate jet traffic, and flights are only allowed to land there coming from airports with thier own US Customs and Border Protection facilities.