Based on the macroeconomic theory of relation between supply and demand, this article analyzes the factors which impact on air ticket price, such as supply, demand, competition, route distance, seasonal, special routes etc.. A model to forecast the airlines economic class ticket price on newopened route, and to be a supplement method of analogue was established , based on the gravity model and multiple linear regression, and using capacity, load factor, distance etc.. The model will be able to suit to seasonal, special routes and longterm forecast requirements by adjusting the multiplication coefficient.