Do you want to know does frontier allow pets ? Only domesticated cats, dogs, hamsters, small house birds, rabbits, and farm animals are allowed on domestic flights inside the United States as well as international flights .  Only domestic cats and dogs are allowed on international flights .  Pet charge must be paid at the time of booking or check-in. For foreign flights, there is a route-based pet cost. The minimum age for cats and dogs is four months. The only animals that can fly for free in the cabin with individuals with disabilities are trained service dogs. There can be up to 10 pet carriers per flight. The frontier airlines pet policy states that domestic dogs, cats, rabbits, farm animals, hamsters, or small house birds may be transported on flights inside the United States for one-way travel fees. This is larger than the pet policy of many other airlines. Only domestic cats and dogs are permitted to enter or exit other nations. For the safety of your pet, the shipping container must always be used. It is not allowed to check pets as luggage.