Keep Calm And Carry On How Do I Make My Cat Comfortable And Calm While Flying Overseas?

How do I make my cat comfortable and calm while flying overseas? - keep calm and carry on

My friend and I have a cat, while in the United Kingdom. Well, the United States again, and I have the cat as hand luggage. How can I remain calm and comfortable during the ride? I will also leave for a layman to Amsterdam. Should I delete it out and let your company use the route and the toilet? I am a little nervous about this trip.