The best way of getting rid of your flight phobia is to overcome them. In your case, I would suggest you distracting yourself away from your imagination. Try watching movie and enjoy their in-flight entertaintment. At least that's what I have been doing during my flight journey. Secondly, bring your MP3 along and enjoy your favorite music. Or either way, try drinking a glass of wine so that you're able to sleep peacefully and comfortably throughout your journey.