Need Help With United Airlines pet policies? Call Buyer care 1-844-987-7017. New purchases of a United ticket on or after April 26, 2024 will incur a one-time in-cabin fee for pets (one-way) – currently at $150 each way. That is, for small pets that fit under the seat in front of you (make sure to check if your carrier matches the acceptable size limits), like dogs, cats and rabbits. How to book a pet on United flight reservation– Add it while booking under the Travel with a pet option or change your existing reservation in My trips section on the website of united. It should be advised that for United Airlines their pet policy has strict guidelines regarding pet carriers and some destinations. Make sure to check out United Airlines pet policy before you book for some detailed clarification and compliance here.