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The air transport market have been continually growing in accordance with its increasing economic and the environments around the air transport industry in its region have been rapidly changing. But the air transport is a hard condition as for a fierce price struggle and high oil price at the most recent. So in the airline management, effective aircraft dispatch is an important problem which is to decide wether to increase or decrease a revenue size during the flight operation in routes-group. Therefor in this paper, Using a mathematical principle methods, we suggest how to increase revenue for effective aircraft size such as average revenue and demands of cabin class each.