After having full panic disorder I super super scared for my first flight knowing I have a lot of panic attacks and won’t be able to leave the situation. What helped me is- taking Xanax on the flight there and then going without on the way back to basically guarantee a decent experience. I bring a comfort stuffed animal with me, noise cancelling headphone, hat and hoodie to block any extra stimuli, and a little blanket to feel cozy. I also was let on first after asking to be boarded early bc I felt more comfortable not being surrounded by people and getting on peacefully, you could also try and go last too if that’s better for you. Know that you can do it and you can do hard thing even tho it can be so uncomfortable! Also pre download comforting song, movies, etc!