What are the fees for traveling with a dog on United Airlines? If you’re considering flying with your pet, it’s essential to understand the financial implications. United Airlines offers two main options for pet travel: in-cabin and cargo. For pets traveling in the cabin, the fee usually ranges from $125 to $200. Conversely, if your dog is too large for cabin travel, you’ll need to book them as cargo, which generally starts around $200 and can increase depending on your dog’s size and weight.