The entire airport is spread over an area of 5,250...

The entire airport is spread over an area of 5,250 acres (21 km2). It originally featured one passenger terminal building, one runway as well as minor cargo and maintenance facilities and is currently undergoing a major extension and replacement consisting of a second runway, an entirely new passenger terminal and a new control tower. The new facilities underwent testing on December 2017 to positive results.

The facilities also includes a VIP terminal, and housing for airport staff as well as Oman Air employees. The Omani Royal Flight and Royal Air Force of Oman are based at the airport and the RAFO also shares its facilities with MCT.
The airport has a new and significantly larger state-of-the-art terminal located at the north of the existing terminal and first runway, opened on March 20, 2018. This new building initially brought the airport's capacity up to 20 million passengers a year upon completion of the first phase.Subsequent enlargements under second and third phases will increase the airport capacity to 24 and 48 million annual passengers respectively.[6] The terminal covers 580,000 sqm and features 118 check-in counters, 10 baggage reclaim belts, 82 immigration counters, 45 gates as well as a new ATC tower, 97 m high. The new terminal is located between the old and new runways and is capable of handling large aircraft such as Airbus A380s and Boeing 747s.

On 31 January 2018, it has been announced that the new terminal will be inaugurated on 20 March 2018 with all current operations to be relocated to the new facility.[8] The new terminal opened on the said date at 3:00 p.m. with the first flight, an Oman Air flight from Najaf, arriving at 6:30 p.m.