Several people who had made recent trips told me that they had seen quite a few dogs walking around so I took a chance because she is ordinarily very good. If you have a service or emotional support dog, they are less stringent but Maggie was listed as a pet. I had to present proof of licensing, inoculations and a health report. While I don't believe there is a charge for the former two, it cost almost the same as a full price ticket. My daughter accompanied me to help and I made sure that she was seated between me and any other passenger.