Jacksonville International Airport (IATA: JAX, ICAO: KJAX, FAA LID: JAX) is a civil-military public airport 13 miles (21 km) north of Downtown Jacksonville, in Duval County, Florida. It is owned and operated by the Jacksonville Aviation Authority.

Construction started in 1965 on a new airport to handle travel to nearby naval bases. The new airport was dedicated on September 1, 1968, replacing Imeson Field.^[4] Terrain precluded lengthening the runways at Imeson, a necessity with the inception of commercial jet airliners. A new idea at JIA was separating departing and arriving passengers on different sides of the terminal. This is no longer the case, and the airport now uses the more typical layout with departing passengers on an upper level with an elevated roadway, and arriving passengers on the lower level.

The new airport was slow to expand, only serving two million passengers a year by 1982, but it served over five million annually by 1999 and an expansion plan was approved in 2000. The first phase, which included rebuilding the landside terminal, the central square and main concessions area, as well as consolidating the security checkpoints at one location, and more parking capacity was completed in 2004–2005. In 2007, 6,319,016 passengers were processed.

The second phase of the expansion program^[5] was carried out over three years, commencing in mid-2006 and projected to cost about $170 million. Concourses A and C were completely rebuilt; the former concourses have been demolished. Work on Concourse B was given a low priority because the capacities of the rebuilt Concourses A and C were more than adequate for existing demand. The expansion was designed by Reynolds, Smith & Hills (RS&H).^[6]

The economic downturn of 2009 caused a decrease in passengers and flights. This led the JAA to commence the demolition of Concourse B in June 2009 because it was safer and easier for the contractor. After the debris was removed, asphalt was laid to provide space for ground equipment parking. The concourse will be rebuilt when passenger traffic increases, which the JAA had originally projected would occur in 2013 but did not materialize.^[7][8] A section of the old concourse eventually became part of an airline club lounge which opened in 2019.

In 2018, the airport handled 6,460,253 passengers, breaking the previous record set in 2007.^[9] 7,186,639 passengers were handled in 2019.^[10] This increase in traffic prompted the JAA to revive the plan to rebuild concourse B.^[11] On May 10, 2024, ground was broken on a new Concourse B. The concourse will have six additional gates, with the ability to expand to up to 10 additional gates. The design of concourses A and C also allow them to be extended to accommodate additional gates. In 2019, RS&H and Jacobs Engineering were chosen to perform the design, while Balfour Beatty was selected as the construction manager for the concourse B project.^[12] By 2022 traffic recovered to over 6.5 million passengers annually and the expansion project was restarted. Concourse B is anticipated to be completed by the end of 2026. ^[13]

Jacksonville International Airport has direct public transit service to Jacksonville Transportation Authority's bus network. The Route 1^[39] bus connects the airport to downtown Jacksonville, with connections to Greyhound Bus Lines and to the Jacksonville Skyway monorail system.

On October 4, 1971, George M. Giffe Jr. hijacked a plane in Nashville, Tennessee, then forced the pilot to fly to Jacksonville, where Giffe killed his wife, the pilot and himself when cornered by the FBI.^[40]

On December 6, 1984, Provincetown-Boston Airlines Flight 1039 crashed on takeoff, killing 11 passengers and 2 crew on board. The debris from the Tampa-bound flight burned near Lem Turner Road. The 1986 National Transportation Safety Board report cited elevator trim control system failure, causing separation of the horizontal stabilizer.^[41]

• Transportation in Jacksonville, Florida
• List of the busiest airports in the United States