Are you wondering if Frontier airlines allow pets on the plane? According to the Frontier Airlines Pet Policy, pets like dogs, cats, hamsters, rabbits, small birds, etc. are permitted. However, the directional charges are to be paid in advance. Pets can travel in a hard-sided or a soft-sided container approved by the FAA. Also, traveling with a pet as carry-on luggage is strictly prohibited. For international flights, only dogs and cats are allowed. The pet you’re planning to travel with, must be at least 8 weeks old.