Petfinder put together a list of the top 5 pet-friendly airlines in 2009.

I was pleasantly surprised to learn that pet rabbits are allowed inside the cabin with you on Continental Airlines. Unfortunately, they were the only airline on the list that allowed rabbits in the cabin if on the plane at all.

Pet Airways offers a pet-only travel option as well. The cabin is climate controlled and all animals are monitored and taken care of by attendants.

For the full pet-friendly airline list, see: Petfinder.com.