On your upcoming trip, are you thinking about bringing along an animal other than your pet dog or cat? Frontier Carriers has more pet travel options than many other airlines, according to frontier airlines pet policy for one-way travel expenses, domestic dogs, cats, rabbits, farm animals, hamsters, or small house birds may be transported on flights inside the United States. Only domesticated dogs and cats are allowed to travel to or from other countries. Your pet must always remain in its transport container for their safety. Pets are not permitted to be checked as luggage. 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.