How to fly with a dog? This is a very common question for every new person. All airline companies will require you to produce a letter from a licensed therapist or medical physician that prescribes an ESA for an emotional disability. Some airlines will also require your therapist or physician to complete a short form that verifies your emotional disability. Some airlines have limitations on the species of animals they allow in the cabin of their aircraft, but you can always travel with a dog on a plane. https://myesadoctor.com/how-to-fly-with-a-dog/