Most airlines allow you to travel with a cat on a plane. They typically allow for a cat to be in an approved carrier that can be placed under the seat in front of you. It’s an FAA (Federal Aviation Administration) policy that animals must stay in the carrier at all times.
Airlines within the United States that allow cats or small dogs in the cabin include American Airlines, Delta Airlines, United Airlines, Alaska Airlines, Hawaiian Airlines, Southwest Airlines, Allegiant Air, JetBlue, and Frontier Airlines. Each has its own policies and fees, but all require an FAA-approved carrier. Most airlines based outside of the U.S. also allow cats in the cabin. Keep in mind that there may be a limit to the number of animals allowed in the cabin, so booking your pet’s ticket as early as possible can help increase the chances of their being room.