A crate like cat carrier will make your cat feel very secure. Most cats enjoy a confined space when they are nervous. Notice how they tighten into a ball against your elbow when they're scared? A front style cat carrier may also be a good choice for this reason. Your cat will be comforted by the close contact, petting and familiar smell. If you are travelling with your cat on an airplane, you should contact the airline to make sure that your cat carrier meets the airline's guidelines for cat carriers in terms of ventilation, closure and so forth. You may want to also make sure that your cat has a current identification tag with your contact information. Familiarize your cat with a new cat carrier prior to travel.