The air transport industry has undergone a lot of changes over the years. These changes were primarily caused by rapidly progressing globalisation. Customer preferences and needs change year to year, hence, the struggle is constant to achieve ever better quality of the provided services. The aviation services market must be considered as a multi-stratum aspect.?The objective of the present article is a diagnosis the revenue of airports and the identification of costs that airports must bear to optimise customer services and to fight global competition.?The empirical analysis uses statistical data collected by airlines and airports. The data was processed and is presented using tables and diagrams.