What are the different types of airports in operation?
There are five types of U.S. airports: • Commercial Service airports are defined as public airports receiving scheduled service and having more than 2,500 enplaned passengers in a year. According to the 2007 NPIAS, there are 517 existing commercial service airports. • Of these 517 commercial service airports, 382 are Primary Airports, defined as having more than 10,000 annual enplanements. Primary airports are further defined as hubs, based on the percentage of the total annual U.S. passenger enplanements: • Large Hubs (30): Each airport handles more than 1% of all the nations air travelers. As a group, these airports handled 68% of all passenger enplanements in 2005. • Medium Hubs (37): Each airport handles between 0.25% and 1% of all the nations air travelers. As a group, these airports handled 20% of all passenger enplanements in 2005. • Small Hubs (72): Each airport handles between 0.05% and 0.25% of all the nations air travelers. As a group, these airports handled 8% of all passen
