For Breeders » Pet Shipping · Updated April 21, 2026
United Airlines Pet Policy for Cats: Fees, Carrier Size, and Rules
United Airlines allows cats to fly in-cabin for a flat fee of $125 each way. Cats must be at least 2 months old for domestic flights and 4 months old for international flights. The cat must stay in an airline-approved carrier that fits under the seat — maximum dimensions are 18″ × 11″ × 11″