It is a major contract carrier for FedEx Express, operating in the eastern United States and the Caribbean region.

MAC is one of the largest feeder airlines in the United States.

Its main maintenance facility is at Kinston Regional Jetport.

[2] All of the ATR, C408, and C208 aircraft operated by Mountain Air are owned by FedEx Express, and are operated by MAC on a "dry lease" basis.

In September 2016 the Mountain Air Cargo fleet included:[3] As of July 13, 2023, the Mountain Air Cargo fleet includes 40 Cessna 208s, 7 Cessna 408 Skycouriers, and 21 ATRs (including 4 ATR 72-600F).