Do you want to travel with your pets with Frontier airlines? Domestic pets are allowed on the plane as long as all the parameters from Frontier Airlines Pet Policy are checked properly. No matter how well-trained your pets are, it is required to keep them in a pet carrier approved by the FAA. Travelers with pets need to pay the directional charges in advance, and in case they fail to do so, they can pay it before the check-in. These airlines value the safety of your pets alongside the safety of the passengers on board so you must comply with the guidance to avoid any sort of trouble.