Palm Beach International Airport (IATA: PBI, ICAO: KPBI, FAA LID: PBI) – also known as PBI Airport and historically as Morrison Field & Palm Beach Air Force Base – is a public airport in Palm Beach County, Florida, United States located just west of the city of West Palm Beach, for which it serves as the primary airport. It is also the primary airport for most of Palm Beach County, serving the suburbs and cities of Boca Raton, Wellington, Boynton Beach, Jupiter, and Palm Beach Gardens. It is the third busiest airport in the Miami metropolitan area after Miami International Airport and Fort Lauderdale–Hollywood International Airport.

Palm Beach Airport is operated by the Palm Beach County Department of Airports. Road access to the airport is direct from I-95, Southern Boulevard, and Congress Avenue. The airport is bordered on the west by Military Trail.

Palm Beach International Airport began operations in 1936 as Morrison Field. It was named in honor of Grace Morrison, a key participant in the planning and organization of the airfield. The first flight departing the field was a New York-bound DC-2 operated by Eastern Air Lines in 1936. The airport was officially dedicated on December 19, 1936.

In 1937, the airport expanded beyond an airstrip and an administration building when the Palm Beach Aero Corporation obtained a lease, built hangars and the first terminal on the south side of the airport. The new terminal was known as the Eastern Air Lines Terminal.

The field was used by the U.S. Army Air Forces during World War II. Following the attack on Pearl Harbor, Morrison Field was used for training and later as a staging base for the Allied invasion of France, with numerous aircraft departing Morrison en route to the United Kingdom to take part in the D-Day invasion of Normandy. Morrison Field was a stopover for flights to and from India, via Brazil and West Africa.

In 1947, the newly established U.S. Air Force returned ownership of Morrison Field to Palm Beach County. The name was then changed to Palm Beach International Airport one year later, in 1948.

The airport was again used by the U.S. Air Force in 1951 and renamed Palm Beach Air Force Base under the control of the Military Air Transport Service (MATS). USAF operations occupied the north half of the airfield while civil operations and the airline terminal used the south half. MATS used the base for training with the host unit being the 1707th Air Transport Wing (Heavy), and its 1740th Heavy Transport Training Unit. The 1707 ATW was known as the "University of MATS", becoming the primary USAF training unit for all Air Force personnel supporting and flying heavy transport aircraft. These included C-124 Globemaster II, C-118 Liftmaster, C-97 Stratofreighter, and C-54 Skymaster maintenance training along with aircrew and transition pilot training. Nearly 23,000 airmen trained at Palm Beach AFB during the Korean War.

The Air Weather Service used Palm Beach AFB as headquarters for hurricane research, flying the first WB-50D Superfortress "Hurricane Hunter" aircraft from the base in 1956.^{[citation needed]}