When it comes to the Best pet friendly airlines Southwest, Alaska Airlines, and JetBlue rank highly for their accommodating pet policies. In order to ensure the comfort of their passengers several airlines permit small pets to travel in the cabin and charge reasonable pet fees. Another great option is American Airlines which allows pets in the cabin on some itineraries. In order to keep pets safe and happy each airline has its own set of rules such as weight restrictions and authorized pet carriers. You and your pet will have a seamless and joyful travel experience if you choose the top pet-friendly airlines.