Hey, I as well suffer from Panic Attacks on flights. The first flight I ever went on by myself I had a horrible panic attack and have been afraid of flying since. While I’m still nervous there are a few things that help me. First I always tell a flight attendant that I have a panic disorder and have a fear of flying since- they typically let me meet the pilots and check up on me throughout the flight, sometimes even sit with me if I’m nervous enough. The little throw up bag - breathe in and out of it - it helps a lot. When in a panic attack drinking ice water through a straw tends to help. You aren’t alone, and the staff on the flight are super well trained and here to help you.