Me too! You're definitely not alone on this. I only got an rx for lorazepam recently and will use (going to go full White Lotus) for my upcoming flight.
Before this, I would use l-theanine. My therapist also recommended EFT tapping, so I downloaded a podcast to take me through that while flying.
I also bring a variety of medications to deal with most common illnesses when I travel, which is not a lot.
And lastly, I force myself to do it occasionally so my DC can see me do things like this. It's not easy, so be kind to yourself and find a supportive practitioner.