Each airline has an individual policy that may or may not accept pets in the cabin. A typical set of rules allows one pet per flight or only a small number of confined pets to ride in the cabin on certain flights. Each airline has rules based on the type, weight and height of the pet; size and type of carrier; and where in the cabin the pet can ride. Most size regulations are based on the type of plane most often used by an individual airline. Some airlines will change pet weight and crate size information based on differing types of planes in service. Passengers changing planes but keeping within the same airline should check the weight and size requirements for each separate leg of the flight.
Typical accepted types of carriers are soft-sided pet carriers with a waterproof bottom or plastic hard-sided carriers. Pets in carriers are considered carry-on baggage and must fit securely under the seat in front of you. Pets must be approved and ticketed in order to accompany you.
Pets that do not fit in the cabin of a plane can often ride in a special pressurized luggage compartment on the same flight as their owner. They can also ride as cargo when unaccompanied. Pets riding in the cargo hold must ride in carriers approved by each individual airline. Hard plastic crates with gated doors and ventilated metal shipping containers are normally allowed by all airlines. Soft crates and wire cages are not allowed to be used as a shipping container.
Pet Air and Pet Airways fly pets only. Pet-only airlines fly your pet in a cabin that is fitted with built-in crates instead of seats. Pets are held in kennel type lounges prior to and after each flight. Flight crew ride in the cabin with your pet to ensure pet safety before, during and after the flight. Flight schedules, rules and regulations for use of personal carriers and service areas vary per airline.