Your cat's travel carrier must go through the luggage X-ray screening device at the airport, but your cat cannot, so you will have to carry her in your arms through the human screening device. She should be wearing a firm-fitting harness with a leash attached to prevent escape.
Do cats need their own plane ticket?
What About a Plane Ticket? Yes, you'll have to buy your pet a ticket. It won't necessarily be the same ticket plus boarding pass that you'll use, but there are various fees based on where and how your pet will ride on the aircraft.