Honolulu International Airport has three terminal buildings.
The Commuter Terminal serves smaller airlines which operate flights between the smaller airports in the island chain.
The Interisland Terminal mainly serves the interisland flights of Hawaiian Airlines and Aloha Airlines. It is designed to handle flights of jet aircraft between the major commercial airports in the Hawaiian Islands, and is also used by Aloha for flights to the west coast of the United States.
The Main Overseas Terminal serves flights to and from the United States mainland and international destinations.
All gates are open to any airline; no gates are assigned to specific airlines.
Wikipedia article:
http://en.wikipedia.org/wiki/Honolulu_International_AirportCategory:
airport tower international honolulu