Voyaging by an airplane is the most popular sort of transportation at the moment. Because of small airline companies, you are able to transfer from one continent to another in a very low costs. Also, voyage form Barcelona to Warsaw last fot two hours, the exact same distance by bus will take almost one day of your time. But if you are reserving a journey by jet, you must to be aware of some regulations. One of it, is to come to the airport, at least two hours before your voyage.
