Increasing amount of people these days tend to be interested in travelling. It is proved by the fact that, above all, more and more corporations offer us possibilities to visit foreign countries in pretty interesting price. Consequently, the percentage of people, who have at least once travelled with an airplane has significantly grown throughout recent years. It is proved by the fact that different carriers such as for example Ryanair, Wizzair, Lufthansa etc. provide from time to time tickets in a quite attractive prize.