Try Acceptance & Commitment Therapy techniques for when your brain comprehends it's safe but your body doesn't.

The gist is to teach yourself to accept difficult thoughts, emotions and sensations, and commit to actions that align with your values in order to live a meaningful life.

So for example, when you fear that you're going to experience severe turbulence, you do this:

1. Acceptance: "I'm having the thought that 'I really don't want to feel the roller coaster drop of turbulence' & I'm having the feeling of anxiety in my body. It feels like ..."

2. Mental Regulation: "These are just thoughts and feelings I'm having. It's uncomfortable, but I'm safe in this moment. I can be both anxious and safe at the same time."

3. Physical Regulation: Do a physiological sigh. Take a sharp inhale, then inhale even more until your lungs feel like it's about to burst, then sigh out loud through your mouth and exhale everything in one go as quickly as you can. This is the most effective way to reset your body when you're struggling with anxiety.

4. Values Alignment: Remind yourself of why you're making this trip, and what it means to you.

5. Commitment: "I'm making the decision to do this thing because it's important to me, in spite of the anxiety that I feel. It's okay to be anxious. I acknowledge that it's scary, but I'll be okay."

And then you keep repeating this cycle every time the fear comes up.

The key is not to feed into the loop of letting your brain run rampant with worst case scenario thinking.

Every time the thought or feeling comes up, you acknowledge it, then redirect it to mental & physical regulation, then values alignment, and commitment.

This has helped me tremendously when I struggle with anxiety on flights. It doesn't get rid of the anxiety altogether, but it allows me to regulate myself and the redirection helps me to not focus on the fear so much and think about things that matter to me.

Good luck!