Hilo International Airport , formerly General Lyman Field, is owned and operated by the Hawaii state Department of Transportation. Located in Hilo, Hawaii County, the airport encompasses and is one of two major airports on Hawaii Island and one of five major airports in the state. Hilo International Airport serves most of East Hawaii, including the districts of Hilo and Puna, as well as portions of the districts of Hāmākua and Kaū. Most flights to the airport are from Honolulu International Airport. These flights are predominantly operated by Hawaiian Airlines, United Airlines, Aloha Air Cargo, and its newest operator, Southwest Airlines.