Jacksonville International Airport (IATA: JAX, ICAO: KJAX, FAA LID: JAX) is a public airport located 12 miles (18 km) north of the downtown of Jacksonville in Duval County, Florida, United States.

The second phase of the expansion program is being carried out over three years, commencing in mid-2006 and is projected to cost about $170 million. It includes demolishing concourses A and C of the airside terminal (which for the most part are built to late-1960's standards), to be completely replaced with more spacious, modern facilities which will also house more gates. These two new concourses are slated to open in the spring of 2009. Concourse B however, will be rebuilt at a later date. Also included in the program is a further expansion of the parking system and a new automated baggage screening system.

In order to accommodate constructing the new airside terminal and apron, most of the western-facing gates in concourses A and C have been permanently closed and their jetways removed.