In order to better instruction airlines to analysis of the civil aircraft economy, this paper proposal an wide- body aircraft trip direct operating cost model from the perspective of macroscopic based on statistical analysis of airlines fleet operation cost data. Firstly, the correlation analysis be used to determine the cost model variables. Secondly, building the aircraft trip direct operation cost model based on trans-log production function, and the ordinary least squares method is used to estimate the function's coefficients. Finally, the model test using 9 aircraft direct operating cost data from 2014 indicate that the average relative error is 0.0711, and an numerical example show that the cost model can be apply to route capacity allocation. So, the model is practical and feasible.
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