The permanent increase of competition within the air transport business has led to signing contracts between air transport companies in order to expand their offer of flight destinations. This fact has led to the formation of 3 big alliances which consist of cooperating air transport companies, namely:
Nowadays all the world significant air transport companies are the members of the above mentioned alliances. For more information click on the name of the particular alliance. The web page of the alliance provides you all the accessible information.