The Aer Lingus pet policy is as follows:
Pets are not accepted in the cabin of any Aer Lingus aircraft.
When traveling within Europe, pets must be booked through a freight forwarder. They’ll be carried in the aircraft hold.
Only domestic cats, dogs and rabbits will be accepted for carriage on Aer Lingus Regional operated flights. This applies to domestic flights within Ireland and flights between Ireland and Britain. Pets will not be carried on flights to and from Ireland and Jersey or Rennes.
Carriage is permitted only with the animal owner’s acknowledgement that there may be risks to the health or welfare of their animal caused by the reaction of an animal to flying.
Due to industry reports of serious damage to aircraft as a result of dogs becoming loose in aircraft holds, the following breeds of dogs are not to be carried under any circumstances on any Aer Lingus aircraft: Akita, American Pit Bull, American Staffordshire Terrier, Argentino, Fila Brazillero, Mastiff, Pit Bull Terrier, Tosa, and Rottweiler. The following snub-nosed / brachycephalic dogs or cats will not be carried due to their inability to breathe easily and cool themselves down: All Bulldogs, Pugs, Boxers, and Persian/Exotic Cats.
Animals need to be at least 10 weeks old when travelling on an Aer Lingus flight.
The maximum weight of an animal container must not exceed 64kg/141lbs.
Taking a pet to a foreign country involves preparation and planning far in advance of your departure date. Requirements for pet travel to a foreign country are set by the destination country. If you are you traveling to another country and bringing along your pet you’ll need to meet the animal health requirements of the country you are visiting.
More information on the Aer Lingus pet policy