“…(Simarmata, Charles An, & Rizaldy, 2014) (Simarmata, Rs, Keke, & Panjaitan, 2016) Aircraft type or fleet mix decisions such as the size of the aircraft and the number of aircraft type use in the fleet have impact in terms of technical and cost efficiency, because each aircraft has different capabilities and performance as well as the airport, although using the B738 aircraft does not mean total operating costs are small or the profits is greater, the airline should pay attention to the size of the demand for a route (Merkert & Hensher, 2011), and take into account the conditions of the airport and other support infrastructure which enable the process of fulfill their needs such as runway length, runway slope, runway strength, navigation facility, availability of GSE, etc., This is important because despite the large number of demand but the aircraft used is not suitable it can cause an airline to loss. (Simarmata, Yuliantini, & Keke, 2017) …”