Transportation of animals in the plane is governed by the rules of the airlines. Each carrier has its own. It is absolutely permissible to carry animals in a plane from Vueling, AirBaltic, AirBerlin, Germanwings, Virgin America. It is forbidden to bring pets on flights AirAsia, Ryanair, EasyJet, Fly Dubai, WizzAir. Tariffs check with the airline. Also do not forget to prepare the animal for the journey .