It is extremely loud and dangerous to dogs. Can you imagine being crated and thrown like a suitcase containing only clothes and travel size toiletries and in the darkest and loudest enviorment you can imagine for hours with no company? If you have a dog who is neither a service dog nor small enough to fit comfortably under the seat in front of you, You have other options: 1. Charter a private jet 2. Drive 3. Hire a pet sitter or find a boarding resort