Planning to travel with your pet on British Airways? British Airways pet policy has clear rules for pet reservation. Call at +44(800)368-6370(OTA) to connect with a travel agent for assistance. Although pets are not allowed inside the cabin, assistance dogs are allowed to travel with their owners abroad. Other pets, like birds, cats, dogs or even fish, are required to travel with you in the hold. British Airways pet fee depends on their weight, the size of the carrier, and your destination. The carrier must be large enough to allow your pet to sit, move, and relax comfortably having sufficient ventilation, access to water and food.