I must admit I thought pets were now allowed on flights if they were in proper cages and had all the rights papers and jabs etc however dont book on Easyjet!! This from their site:
14 Carriage of live animals
The carriage of live animals, including pets, insects, reptiles, or any other form of livestock, is forbidden under any circumstances, with the exception of service dogs for blind and/or deaf passengers and helping dogs for the disabled on all UK domestic flights and on all flights starting and finishing within mainland Europe (excluding UK routes). Service dogs and helping dogs will not be permitted to travel on flights to/from UK to mainland Europe or to/from Morocco. Flights from mainland Europe to Sicily, Sardinia or the Balearic Island (or vice versa) are considered flights within mainland Europe for this purpose. ?Mainland Europe? for the purposes of this policy is considered to be all routes on the easyJet network, excluding flights to/from UK to mainland Europe or to/from Morocco.
Check the other carriers web sites perhaps they have different policies on animals.
You can of course bring them in a car!