My Wife used to have them when travelling long distances. If we were going to catch a plane she would go nuts!

She saw a hypnotherapist who put her under and found out the reason for the panic attacks. It took almost 10 visits but eventually it all came out why she had a problem, and once you know the root of any problem it's not too hard to fix. Since then she's a different person, calmer in all situations. Has been for 8 or 9 years now. Worth every penny.