This document discusses various levels of cooperation between airlines in the context of internationalization and globalization. It begins by defining internationalization of the economy and how civil aviation is effective for internationalization. Airlines initially cooperate through interline agreements which allow them to issue connecting tickets and share sales networks. Cooperation advances to code-sharing, where flights are operated by one airline but seats are sold by multiple airlines. The highest level of cooperation is airline alliances, where large networks are combined and standards/programs are harmonized under brands like SkyTeam and oneworld. Global alliances have formed to mirror economic integration and account for over half of global passenger traffic. Specific Russian airlines have entered alliances with European carriers like Iber