Realize first that your fear really has nothing to do with flying. It probably has to do with either not being in control or of death.
If you step back and think logically, unless you've had a traumatic experience with flying itself, the fear you are feeling probably has nothing to do with riding on an airplane.
I could be wrong, only you know the answer to this. Look at your life objectively. Do you notice other area's in your life where you have a problem giving over control to someone else? Examples would be driving. Are you able to ride comfortably while another person drives? How about housework, or in the work environment...are you apt to "show" someone how to do things rather than allow them to figure out their own way of doing things?
Or, it could be a fear of death itself. Not knowing your experiences only you can answer these questions.
Riding on an airplane is not a scary experience in and of itself. Our minds have a way of playing tricks on us and attaching all sorts of fears and stress to normal, mundane events. If you have lost a loved one to a plane crash, then the fear you hold is born of a direct past trauma and that is a different issue altogether. If this is the case, you should really seek some therapy in order to move past this obstacle in your life.
If that is not the case...
First figure out what you are really afraid of? Being out of control, death, the unknown...find your triggers.
Then work to identify why you attach a fearful response to that trigger. Example...letting go of control. There must be some instance in your past where you did trust and let go of your control and were either taken advantage of or hurt in the process. Look at the event objectively and acknowledge it, then actively work to get past it and not let that one event rule your life.
It's a choice. If letting go of control is the issue, start with small steps to become more comfortable in those types of situations, then when it comes to riding on an airplane, it won't be as bad.
You can try hypnosis as a way of overcoming a fear but until you look and figure out what triggers that emotion, I would wait. Otherwise it is bound to crop up in other area's of your life not just when riding on an airplane.
You can try therapy if you think that would help, but I tend to lean toward self help more than paying someone $200 an hour to sit and listen. After all, you know yourself best and it is quicker for you to scroll through your own memories than to retell your whole life to a stranger.
I hope this helps~