Hi,
i also suffer from panic attacks..The last one ended up in a weeks stay at the coronary hospital.
Try to think beyond the journey. The plane is a means to get else where. You are safer in the air than on the ground.
Going to another country can be really exciting, different cultures and scenery I am sure will do you really good.
Have a nice relaxed bath, put on some relaxing music. If you have any lavender ...That is great.
If you feel an attack coming on breath in and out of a paper bag to get the oxygen levels coorect.
Try to distract yourself, ring a freind or go window shopping for an hour.
Any worries write them down. That way it is on paper and maybe can get out of your head.
Any last minute panics can also be wrote down so you don't forget.
Pop on a comedy, laughter is a fantasic way of relaxation.