I'm not so much claustophobic but have suffered etreme anxiety when flying, what I found helped immensely was listening to relaxation techniques, especially Paul McKenna's...http://www.paulmckenna.com/product-f...nload-214.aspx I downloaded it to my ipod. However I note he has this one which may be more suited to your needs http://www.paulmckenna.com/product-c...nload-212.aspx

Good luck, its horrible being at the mercy of your anxiety. It does work, before when I read the post above about

Also, try not to think of the plane as a giant Smarties tube made out of crumply aluminium in which you are completely trapped and utterly helpless.

That would have previously sent me into a stomach churning panic attack, just reading it, now I just laughed.