Notify the airline that you will be taking your pet with you at an early stage.
Dogs and cats traveling within the EU must be at least 4 months old. Animals traveling into the EU from unlisted third states must be at least 7 months old.
Sick, injured animals and animals that might give birth while being transported, as well as animals that have given birth less than 48 hours beforehand, are excluded from transport.
Animals weighing up to 5 or 6 kg (depending on the airline) can be carried in the cabin in a suitable cage. Animals exceeding that weight have to be carried in the cargo hold.