Muwaffaq Salti Air Base (MSAB, , ) is a Royal Jordanian Air Force air base located in Azraq, Zarqa Governorate, Jordan.
In 1918, during World War I, T. E. Lawrence, also known as Lawrence of Arabia, used the historic castle in Azraq and the plains at that site as a base and landing ground for the aircraft supporting the column pushing north towards Syria. The main qualities of the area were its good visibility and fine weather for flying.
In 1976, the area was chosen by the Royal Jordanian Air Force for a major new air base. Construction started that same year. In November 1980, No 1 (Northrop F-5A/B Freedom Fighter) and No 11 Squadrons (F-5E/F Tiger II) were deployed there.
The air base was officially opened on 24 May 1981. It was named after Lieutenant Muwaffaq Salti who died in battle with the Israeli Air Force on 13 November 1966, during the Battle of Samou. It was initially home to Nos 1 and 25 Mirage squadrons. Between 1997 and 2007 Mirage squadrons were based there.
Between October 2014 and July 2015 the Belgian Air Component deployed six Lockheed Martin F-16AM Fighting Falcons under Operation Desert Falcon, later Operation Inherent Resolve, during the international military intervention against the Islamic State of Iraq and the Levant.
In 2019, the United States began a $143 million expansion of the airbase. The expansion includes a new airlift apron, a personnel recovery and special operations forces apron, a close air support (CAS) and intelligence, surveillance, and reconnaissance (ISR) apron, and a cargo marshaling yard.
In April 2020, the U.S. Army Corps of Engineers Middle East District contracted American International Contractors to build infrastructure on the airbase, including aprons and taxiways, a marshaling yard facility, and support facilities and utilities. Beginning in November 2021, the United States began upgrading the airbase to turn it into a more permanent base, including building a new air traffic control tower.
Since 1997, Jordanian squadrons number 1, 2 and 6 (General Dynamics F-16 Fighting Falcon) have been based there.
The American Government along with other countries has deployed various aircraft there due to the military intervention against ISIS. The base is reported to host several MQ-9 Reaper drones, based on satellite imagery. The base was partly operated by the 407th Air Expeditionary Group.