Increasing number of people nowadays tend to be keen on travelling. It is implied by the fact that, first of all, improving number of companies guarantee us opportunities to visit foreign countries in relatively interesting price. Consequently, the percentage of people, who have at least once travelled with an airplane has considerably improved during recent years. It is proved by the fact that different carriers such as inter alia Ryanair, Wizzair, Lufthansa etc. provide from time to time tickets in a quite attractive prize.