Several airlines do allow small dogs to travel in the cabin. They typically have to be small enough to fit in a carrier that will fit under the seat in front of you. If you have a larger dog, you will likely be better off road-tripping to your destination. If you need to fly with your large dogs, they must go in the cargo hold. Be sure to visit your vet to ensure your dog is healthy enough to do so, as this comes with many risks.