Climate change is a consequence of the impact of human activity on the environment, especially those where greenhouse gases are realesed into the atmosphere. Aviation is also one of those activities, where a lot of greenhouse gases are released into the atmosphere. For this reason, International Civil Aviation Organization has prepared a program to limit emissions. The diploma thesis analyzes the requirements that airilne company must fulfill. On the basis of the flight data, annual emissions and requirements for their offset are determined. Aviation company can reduce a part of their emissions by producing electricty through a photovoltaic system. Calculation shows the quantity of annual energy produced and the saved emissions. With regard to the entire financial input into the project and it's savings, the financial status of investment can be determined.