Developing number of end-users, who would like to travel, tend to say that it has never been as easy as it is at present. As a result, we can be also certain that in order to travel to more regions on the Earth we are not obligated to have for instance as much money as it used to be necessary for example some decades ago. One of the most worth mentioning developments that occurred in the last period of time is connected with reduction of the costs of airplane tickets.