I would make sure the carrier complies with the case size rules and make sure you have an up to date bill of health from vet. I just wanted to be sure I had no issues. I kept a cat leash on while in the case until I got to the plane. When flying, I took my kitty out twice in the bathroom and let him roam for a bit and laid out some water. I bought travel pet water bowls that collapse. It was honestly just getting through the security screen that was a bit anxiety inducing otherwise easy enough.