I don't mean to be rude but I don't think you are suffering from ocd, as a person who does have it,it's a misuse of words. However you could be suffering from generalized anxiety disorder, paranoia, pure o which is obsessional thoughts or just a general fear of flying. It's understandable to have that anxiety about terrorists what with everything that has happened over the years. If you do have to travel via plane I'd recommend you seek a type of help called CBT,it doesn't work for everyone,but its defo worth a try :)
Hi there. Is this the only worry you have or do you have other irrational fears?