Company restructuring is a business reorganization, a change of financial and capital structure, strategies, and business policies to improve company transformation. The desire for better business results and achievement of set goals will encourage companies to carry out restructuring. Business alliances represent one of the ways businesses can decide when they want to undertake business restructuring. The aim of this graduate thesis is to determine the influence of business alliances on airlines operations in the implementation of company restructuring. It tries to determine whether business associations have an impact on airlines operations in the form of higher revenues, profits, share costs and increased market share. Taking a business analysis of several individual business federation members comes to the conclusion of accepting business alliances as a positive influence on corporate restructuring. Business associations that make up for passenger air transport are a good choice in business restructuring. The aim of the paper was also to examine whether business alliances make greater business rationalization, and also greater profitability. Consideration was given to the operation of the airline during several business years, several years before and after entering the business alliance. It can be stated that business alliances have a positive impact on business and leave a higher level of gains and revenues, but a longer flow of time, along with other environmental impacts. Business outcomes and market advantages are also analyzed, it can be said that business allies, after joining the alliance, have a larger market share and cover a larger part of the market.