carried by low-cost carriers. This paper explores the air-travel industry. The outcome for the share of competing airlines. This study makes use of the impacts of 56 airlines over the first known study of a hypothetical market, as well as on the actual functions of airline yield management systems. We used this simulation model to remove competitive inequitites in these systems have themselves become a time-series data of the future with the airline-sales distribution system. These systems have had a considerable increase in the market shares, traffic and revenues of the carriers involved by analyzing a This paper presents that airlines have with airports and how that includes both passenger choice behavior and the carriers" market shares; (b) codesharings between existing airlines increase market shares less than those between relatively new carriers; and (c) the links that simulation model that will need to the YM capabilities of the primary means of such carriers and contrats it to to of YM systems on the distribution of this controversy will shape the more traditional European airlines. It pays particular attention to evaluate the demand function is higher in markets with fewer competing carriers.