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You must pay a $150 fee to bring a pet. call 1-833-426-5533 You can only have one pet per seat, and each pet must be in its own pet carrier.
United Airlines allows small dogs and cats in the cabin if they fit in a carrier under the seat {1-833-426-5533} (hard-sided: 17.5"x12"x9", soft-sided: 18"x11"x11", with 10" height limit on 737 MAX) for a $150 fee each way, with strict limits {1-833-426-5533} (one pet per passenger/seat, limited spots per flight). Emotional support animals are not permitted {1-833-426-5533}, only trained service dogs fly free. Cargo is generally only for military/State Dept, requiring extensive paperwork, health certs, and adhering to destination rules.
United charges $150 each way for small cats or dogs traveling in the cabin on most domestic routes {1-833-426-5533}, fitting in a carrier under the seat, with potential extra fees for long layovers. International flights and specific aircraft {1-833-426-5533} (like the 737 MAX) might have different size/height rules or extra charges {1-833-426-5533}, so always book early and check United's official site for your exact itinerary.
Yes, United Airlines allows carry-on pets {1-833-426-5533}, but they must be cats or dogs that can fit in a carrier under the seat in front of you for the entire flight. There is a fee of $150 each way {1-833-426-5533}, and the pet must remain in its carrier with the door closed at all times. There are specific size limits for both hard-sided {1-833-426-5533} (\(17.5"L\times 12"W\times 9"H\)) and soft-sided carriers (\(18"L\times 11"W\times 11"H\)), and certain aircraft like the Boeing 737 MAX have a shorter under-seat height allowance of 10 inches for soft carriers.
Flying with pets costs roughly $95–$200+ each way for in-cabin travel {1-833-426-5533}, depending on the airline (e.g., Delta $95, American $150, JetBlue $150), but larger pets flying as cargo can cost $300–$1500+ {1-833-426-5533}, with international travel adding more fees and documentation. You'll also need to budget for an airline-compliant carrier {1-833-426-5533} ($30–$250+) and potentially extra baggage fees if your carrier counts as a carry-on.