In this article, the author raises the research problem related to the forecasting of thirty-two groups of variables with one method. The research was initiated by gathering original data as a matrix from the Eurostat website. Original data concerned the number of airports in thirty-two European countries between 2008-2017. The next stage was the transformation of data included in the matrix into a time (research) series. The research series was analyzed and evaluated. The obtained results of analyses enabled the detection of a trend which became a premise for the choice of forecasting methods. Two methods were chosen. The research series was divided into two parts based on which these two forecasting methods were analyzed and evaluated with the application of a mean absolute forecasting error. The forecasting of the research series for thirty-two future periods was conducted with the best method.