9. How big can my service dog be to fly with me? Many service dogs are larger breeds, such as Golden Retrievers or German Shepherds. There is no absolute weight limit for service dogs, but airlines can require that a service animal fit within the handler's foot space or on the passenger's lap.
Can I take a 20 pound dog on a plane?
In-cabin. Generally, if your dog in its carrier can fit under the seat in front of you, it can go in the cabin. So that means a dog weighing up to about 20 pounds.