Frontier Airlines welcomes pets to travel in the cabin and as checked baggage, subject to certain restrictions and fees. The Frontier pet policy allows small dogs and cats to travel in the cabin for a fee, provided they are in an approved carrier that fits under the seat. Larger pets can travel as checked baggage in a climate-controlled area of the plane. Owners must ensure their pets meet all necessary health requirements and have the appropriate documentation. Additional fees and restrictions apply, so it's essential to review Frontier Airlines pet policy before traveling with your furry friend.