Do you wish to travel with your furry friend on a Frontier flight? Before travelling we always want to ensure the safety of our pets, for this reason, Frontier pet in cabin guidelines are to be implemented. Pet dogs, cats, bunnies, hamsters, guinea pigs, or little family birds can be taken on flights within the US for a one-way directional charge. Also, pets are required to be carried in a travel pet carrier approved by FAA for safety reasons. The size and weight limitations for pets are given on the official website of Frontier Airlines.