Are you worried about your pet’s safety at the frontier ? Due to changes in US law, Emotional Support Animals (ESAs) are no longer permitted under frontier airlines pet policy.  Mental Service Dogs and other trained Assistance Service Dogs, however, are permitted to fly in the cabin for free. At all times, pets must be contained in the travel carrier. It is the responsibility of the pet owner to calm down their disruptive animal without removing it from the pet carrier. The question of whether or not Frontier is a good airline for flying with dogs . Traveling with your pets is a pleasure with Frontier Airlines.. The Frontier Airlines Pet Tickets are an obvious sign to all passengers about the affordable pet travel it offers. The wonderful pet travel regulations in Frontier also make it the best place to fulfill your mission. Small dogs and cats may travel in the cabin according to the Frontier Airlines pet policy, but no pets may be booked in as checked luggage or cargo or transported in the hold. Cats and dogs must be at least 8 weeks old to fly in the cabin