I think my brother is to low functioning for a plane ride. I have seen him freak out because of dogs and having the on a plane puts everyone at risk. It's good to know that Carnival works with you. I wonder if you used ear phones to block the noise, if your son would do better in the dining room? My brother has hyper sensitive hearing also he will become very upset if a child is crying. I cut his hair and I can't use electric clippers at all, he can't stand that sound.