The Analysis on Distance Factor between Cities on Demand Air Travel

The position and the role of The Air transportation industry is very important in different field of economic, politic and society. It is one of the main basics of sustainable development and balanced in human communities. In fact nets of transportation related very close to the factors such as economic, safety and communities justice. On the other hand, The Air transportation's industry is an important factor in the improvement of economic, social and cultural in the Republic of Islamic of Iran. For this reason in this research by using the data about the volume of input and output Air passengers of 98 cities monthly between 90 until 94 years and distance between above cities by using gravity model and SPSS try to specified the affect of distance on the demand of Air travel. The result of this research identified that the distance between cities 31% can be affected on the demand of Air travel but other factors affected.